diff --git a/frontend_server_common/CHANGELOG.md b/frontend_server_common/CHANGELOG.md
index 51d1510cd..a2a8ac29e 100644
--- a/frontend_server_common/CHANGELOG.md
+++ b/frontend_server_common/CHANGELOG.md
@@ -1,3 +1,6 @@
+## 0.1.1
+- Remove dead code
+
 ## 0.1.0
 
 - Initial version
diff --git a/frontend_server_common/lib/src/asset.dart b/frontend_server_common/lib/src/asset.dart
deleted file mode 100644
index e08128db0..000000000
--- a/frontend_server_common/lib/src/asset.dart
+++ /dev/null
@@ -1,64 +0,0 @@
-// Copyright 2020 The Dart Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// @dart = 2.9
-
-// Note: this is a copy from flutter tools, updated to work with dwds tests,
-// most functionality removed
-
-import 'dart:async';
-
-import 'devfs_content.dart';
-
-const AssetBundleFactory _manifestFactory = _MockManifestAssetBundleFactory();
-
-const String defaultManifestPath = 'pubspec.yaml';
-
-/// Injected factory class for spawning [AssetBundle] instances.
-abstract class AssetBundleFactory {
-  static AssetBundleFactory get defaultInstance => _manifestFactory;
-
-  /// Creates a new [AssetBundle].
-  AssetBundle createBundle();
-}
-
-abstract class AssetBundle {
-  Map<String, DevFSContent> get entries;
-
-  /// Returns 0 for success; non-zero for failure.
-  Future<int> build({
-    String manifestPath = defaultManifestPath,
-    String assetDirPath,
-    String packagesPath,
-    bool includeDefaultFonts = true,
-    bool reportLicensedPackages = false,
-  });
-}
-
-class _MockManifestAssetBundleFactory implements AssetBundleFactory {
-  const _MockManifestAssetBundleFactory();
-
-  @override
-  AssetBundle createBundle() => _MockManifestAssetBundle();
-}
-
-class _MockManifestAssetBundle implements AssetBundle {
-  /// Constructs an [_MockManifestAssetBundle] that gathers the set of assets from the
-  /// pubspec.yaml manifest.
-  _MockManifestAssetBundle();
-
-  @override
-  final Map<String, DevFSContent> entries = <String, DevFSContent>{};
-
-  @override
-  Future<int> build({
-    String manifestPath = defaultManifestPath,
-    String assetDirPath,
-    String packagesPath,
-    bool includeDefaultFonts = true,
-    bool reportLicensedPackages = false,
-  }) async {
-    return 0;
-  }
-}
diff --git a/frontend_server_common/lib/src/devfs.dart b/frontend_server_common/lib/src/devfs.dart
index 2fa2027a8..323c92fc1 100644
--- a/frontend_server_common/lib/src/devfs.dart
+++ b/frontend_server_common/lib/src/devfs.dart
@@ -10,22 +10,17 @@ import 'dart:io';
 
 import 'package:dwds/dwds.dart';
 import 'package:file/file.dart';
-import 'package:logging/logging.dart';
 import 'package:meta/meta.dart';
 import 'package:package_config/package_config.dart';
 import 'package:path/path.dart' as p;
 
-import 'asset.dart';
 import 'asset_server.dart';
 import 'bootstrap.dart';
-import 'devfs_content.dart';
 import 'frontend_server_client.dart';
 import 'utilities.dart';
 
 final String dartWebSdkPath = p.join(dartSdkPath, 'lib', 'dev_compiler');
 
-Logger _logger = Logger('WebDevFs');
-
 class WebDevFS {
   WebDevFS({
     this.fileSystem,
@@ -71,7 +66,6 @@ class WebDevFS {
 
   Future<UpdateFSReport> update({
     String mainPath,
-    AssetBundle bundle,
     String dillOutputPath,
     @required ResidentCompiler generator,
     List<Uri> invalidatedFiles,
@@ -101,17 +95,8 @@ class WebDevFS {
         soundNullSafety ? dartSdkSourcemapSound : dartSdkSourcemap;
     assetServer.writeFile('/dart_sdk.js', sdk.readAsStringSync());
     assetServer.writeFile('/dart_sdk.js.map', sdkSourceMap.readAsStringSync());
-    // TODO(jonahwilliams): refactor the asset code in this and the regular devfs to
-    // be shared.
-    if (bundle != null) {
-      await writeBundle(
-        fileSystem.directory(p.joinAll(['build', 'assets'])),
-        bundle.entries,
-      );
-    }
 
     generator.reset();
-
     var compilerOutput = await generator.recompile(
         Uri.parse('org-dartlang-app:///$mainPath'), invalidatedFiles,
         outputPath: p.join(dillOutputPath, 'app.dill'),
@@ -191,6 +176,30 @@ class WebDevFS {
       ));
 }
 
+class UpdateFSReport {
+  final bool _success;
+  final int _invalidatedSourcesCount;
+  final int _syncedBytes;
+
+  UpdateFSReport({
+    bool success = false,
+    int invalidatedSourcesCount = 0,
+    int syncedBytes = 0,
+  })  : _success = success,
+        _invalidatedSourcesCount = invalidatedSourcesCount,
+        _syncedBytes = syncedBytes;
+
+  bool get success => _success;
+  int get invalidatedSourcesCount => _invalidatedSourcesCount;
+  int get syncedBytes => _syncedBytes;
+
+  /// JavaScript modules produced by the incremental compiler in `dartdevc`
+  /// mode.
+  ///
+  /// Only used for JavaScript compilation.
+  List<String> invalidatedModules;
+}
+
 String _filePathToUriFragment(String path) {
   if (Platform.isWindows) {
     var startWithSlash = path.startsWith('/');
@@ -203,26 +212,3 @@ String _filePathToUriFragment(String path) {
   }
   return path;
 }
-
-Future<void> writeBundle(
-    Directory bundleDir, Map<String, DevFSContent> assetEntries) async {
-  if (bundleDir.existsSync()) {
-    try {
-      bundleDir.deleteSync(recursive: true);
-    } on FileSystemException catch (e, s) {
-      _logger.warning(
-          'Failed to clean up asset directory ${bundleDir.path}.\n'
-          'To clean build artifacts, use the command "flutter clean".',
-          e,
-          s);
-    }
-  }
-  bundleDir.createSync(recursive: true);
-
-  await Future.wait<void>(assetEntries.entries
-      .map<Future<void>>((MapEntry<String, DevFSContent> entry) async {
-    var file = fileSystem.file(fileSystem.path.join(bundleDir.path, entry.key));
-    file.parent.createSync(recursive: true);
-    await file.writeAsBytes(await entry.value.contentsAsBytes());
-  }));
-}
diff --git a/frontend_server_common/lib/src/devfs_content.dart b/frontend_server_common/lib/src/devfs_content.dart
deleted file mode 100644
index 3b09c15c7..000000000
--- a/frontend_server_common/lib/src/devfs_content.dart
+++ /dev/null
@@ -1,230 +0,0 @@
-// Copyright 2020 The Dart Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// @dart = 2.9
-
-// Note: this is a copy from flutter tools, updated to work with dwds tests
-
-import 'dart:async';
-import 'dart:convert';
-
-import 'package:file/file.dart';
-import 'package:logging/logging.dart';
-
-import 'utilities.dart';
-
-Logger _logger = Logger('DevFsContent');
-
-/// Common superclass for content copied to the device.
-abstract class DevFSContent {
-  /// Return true if this is the first time this method is called
-  /// or if the entry has been modified since this method was last called.
-  bool get isModified;
-
-  /// Return true if this is the first time this method is called
-  /// or if the entry has been modified after the given time
-  /// or if the given time is null.
-  bool isModifiedAfter(DateTime time);
-
-  int get size;
-
-  Future<List<int>> contentsAsBytes();
-
-  Stream<List<int>> contentsAsStream();
-
-  /// Return the list of files this content depends on.
-  List<String> get fileDependencies => <String>[];
-}
-
-// File content to be copied to the device.
-class DevFSFileContent extends DevFSContent {
-  DevFSFileContent(this.file);
-
-  final FileSystemEntity file;
-  File _linkTarget;
-  FileStat _fileStat;
-
-  File _getFile() {
-    if (_linkTarget != null) {
-      return _linkTarget;
-    }
-    if (file is Link) {
-      // The link target.
-      return fileSystem.file(file.resolveSymbolicLinksSync());
-    }
-    return file as File;
-  }
-
-  void _stat() {
-    if (_linkTarget != null) {
-      // Stat the cached symlink target.
-      var fileStat = _linkTarget.statSync();
-      if (fileStat.type == FileSystemEntityType.notFound) {
-        _linkTarget = null;
-      } else {
-        _fileStat = fileStat;
-        return;
-      }
-    }
-    var fileStat = file.statSync();
-    _fileStat =
-        fileStat.type == FileSystemEntityType.notFound ? null : fileStat;
-    if (_fileStat != null && _fileStat.type == FileSystemEntityType.link) {
-      // Resolve, stat the symlink target.
-      var resolved = file.resolveSymbolicLinksSync();
-      var linkTarget = fileSystem.file(resolved);
-      // Stat the link target.
-      var fileStat = linkTarget.statSync();
-      if (fileStat.type == FileSystemEntityType.notFound) {
-        _fileStat = null;
-        _linkTarget = null;
-      }
-    }
-    if (_fileStat == null) {
-      _logger.severe(
-          'Unable to get status of file "${file.path}": file not found.');
-    }
-  }
-
-  @override
-  List<String> get fileDependencies => <String>[_getFile().path];
-
-  @override
-  bool get isModified {
-    var _oldFileStat = _fileStat;
-    _stat();
-    if (_oldFileStat == null && _fileStat == null) {
-      return false;
-    }
-    return _oldFileStat == null ||
-        _fileStat == null ||
-        _fileStat.modified.isAfter(_oldFileStat.modified);
-  }
-
-  @override
-  bool isModifiedAfter(DateTime time) {
-    var _oldFileStat = _fileStat;
-    _stat();
-    if (_oldFileStat == null && _fileStat == null) {
-      return false;
-    }
-    return time == null ||
-        _oldFileStat == null ||
-        _fileStat == null ||
-        _fileStat.modified.isAfter(time);
-  }
-
-  @override
-  int get size {
-    if (_fileStat == null) {
-      _stat();
-    }
-    // Can still be null if the file wasn't found.
-    return _fileStat?.size ?? 0;
-  }
-
-  @override
-  Future<List<int>> contentsAsBytes() => _getFile().readAsBytes();
-
-  @override
-  Stream<List<int>> contentsAsStream() => _getFile().openRead();
-}
-
-/// Byte content to be copied to the device.
-class DevFSByteContent extends DevFSContent {
-  DevFSByteContent(this._bytes);
-
-  List<int> _bytes;
-
-  bool _isModified = true;
-  DateTime _modificationTime = DateTime.now();
-
-  List<int> get bytes => _bytes;
-
-  set bytes(List<int> value) {
-    _bytes = value;
-    _isModified = true;
-    _modificationTime = DateTime.now();
-  }
-
-  /// Return true only once so that the content is written to the device only once.
-  @override
-  bool get isModified {
-    var modified = _isModified;
-    _isModified = false;
-    return modified;
-  }
-
-  @override
-  bool isModifiedAfter(DateTime time) {
-    return time == null || _modificationTime.isAfter(time);
-  }
-
-  @override
-  int get size => _bytes.length;
-
-  @override
-  Future<List<int>> contentsAsBytes() async => _bytes;
-
-  @override
-  Stream<List<int>> contentsAsStream() =>
-      Stream<List<int>>.fromIterable(<List<int>>[_bytes]);
-}
-
-/// String content to be copied to the device.
-class DevFSStringContent extends DevFSByteContent {
-  DevFSStringContent(String string)
-      : _string = string,
-        super(utf8.encode(string));
-
-  String _string;
-
-  String get string => _string;
-
-  set string(String value) {
-    _string = value;
-    super.bytes = utf8.encode(_string);
-  }
-
-  @override
-  set bytes(List<int> value) {
-    string = utf8.decode(value);
-  }
-}
-
-// Basic statistics for DevFS update operation.
-class UpdateFSReport {
-  UpdateFSReport({
-    bool success = false,
-    int invalidatedSourcesCount = 0,
-    int syncedBytes = 0,
-  }) {
-    _success = success;
-    _invalidatedSourcesCount = invalidatedSourcesCount;
-    _syncedBytes = syncedBytes;
-  }
-
-  bool get success => _success;
-  int get invalidatedSourcesCount => _invalidatedSourcesCount;
-  int get syncedBytes => _syncedBytes;
-
-  /// JavaScript modules produced by the incremental compiler in `dartdevc`
-  /// mode.
-  ///
-  /// Only used for JavaScript compilation.
-  List<String> invalidatedModules;
-
-  void incorporateResults(UpdateFSReport report) {
-    if (!report._success) {
-      _success = false;
-    }
-    _invalidatedSourcesCount += report._invalidatedSourcesCount;
-    _syncedBytes += report._syncedBytes;
-    invalidatedModules ??= report.invalidatedModules;
-  }
-
-  bool _success;
-  int _invalidatedSourcesCount;
-  int _syncedBytes;
-}
diff --git a/frontend_server_common/lib/src/frontend_server_client.dart b/frontend_server_common/lib/src/frontend_server_client.dart
index 68f9a236b..9d3f92050 100644
--- a/frontend_server_common/lib/src/frontend_server_client.dart
+++ b/frontend_server_common/lib/src/frontend_server_client.dart
@@ -164,9 +164,9 @@ abstract class _CompilationRequest {
 
   Completer<CompilerOutput> completer;
 
-  Future<CompilerOutput> _run(DefaultResidentCompiler compiler);
+  Future<CompilerOutput> _run(ResidentCompiler compiler);
 
-  Future<void> run(DefaultResidentCompiler compiler) async {
+  Future<void> run(ResidentCompiler compiler) async {
     completer.complete(await _run(compiler));
   }
 }
@@ -186,7 +186,7 @@ class _RecompileRequest extends _CompilationRequest {
   PackageConfig packageConfig;
 
   @override
-  Future<CompilerOutput> _run(DefaultResidentCompiler compiler) async =>
+  Future<CompilerOutput> _run(ResidentCompiler compiler) async =>
       compiler._recompile(this);
 }
 
@@ -209,7 +209,7 @@ class _CompileExpressionRequest extends _CompilationRequest {
   bool isStatic;
 
   @override
-  Future<CompilerOutput> _run(DefaultResidentCompiler compiler) async =>
+  Future<CompilerOutput> _run(ResidentCompiler compiler) async =>
       compiler._compileExpression(this);
 }
 
@@ -234,7 +234,7 @@ class _CompileExpressionToJsRequest extends _CompilationRequest {
   String expression;
 
   @override
-  Future<CompilerOutput> _run(DefaultResidentCompiler compiler) async =>
+  Future<CompilerOutput> _run(ResidentCompiler compiler) async =>
       compiler._compileExpressionToJs(this);
 }
 
@@ -242,7 +242,7 @@ class _RejectRequest extends _CompilationRequest {
   _RejectRequest(Completer<CompilerOutput> completer) : super(completer);
 
   @override
-  Future<CompilerOutput> _run(DefaultResidentCompiler compiler) async =>
+  Future<CompilerOutput> _run(ResidentCompiler compiler) async =>
       compiler._reject();
 }
 
@@ -251,75 +251,8 @@ class _RejectRequest extends _CompilationRequest {
 ///
 /// The wrapper is intended to stay resident in memory as user changes, reloads,
 /// restarts the Flutter app.
-abstract class ResidentCompiler {
-  factory ResidentCompiler(
-    String sdkRoot, {
-    String packageConfigPath,
-    List<String> fileSystemRoots,
-    String fileSystemScheme,
-    String platformDill,
-    bool verbose,
-    CompilerMessageConsumer compilerMessageConsumer,
-  }) = DefaultResidentCompiler;
-
-  // TODO(jonahwilliams): find a better way to configure additional file system
-  // roots from the runner.
-  // See: https://github.com/flutter/flutter/issues/50494
-  void addFileSystemRoot(String root);
-
-  /// If invoked for the first time, it compiles Dart script identified by
-  /// [mainUri], [invalidatedFiles] list is ignored.
-  /// On successive runs [invalidatedFiles] indicates which files need to be
-  /// recompiled. If [mainUri] is null, previously used [mainUri] entry
-  /// point that is used for recompilation.
-  /// Binary file name is returned if compilation was successful, otherwise
-  /// null is returned.
-  Future<CompilerOutput> recompile(Uri mainUri, List<Uri> invalidatedFiles,
-      {@required String outputPath, @required PackageConfig packageConfig});
-
-  Future<CompilerOutput> compileExpression(
-    String expression,
-    List<String> definitions,
-    List<String> typeDefinitions,
-    String libraryUri,
-    String klass,
-    bool isStatic,
-  );
-
-  Future<CompilerOutput> compileExpressionToJs(
-      String libraryUri,
-      int line,
-      int column,
-      Map<String, String> jsModules,
-      Map<String, String> jsFrameValues,
-      String moduleName,
-      String expression);
-
-  /// Should be invoked when results of compilation are accepted by the client.
-  ///
-  /// Either [accept] or [reject] should be called after every [recompile] call.
-  void accept();
-
-  /// Should be invoked when results of compilation are rejected by the client.
-  ///
-  /// Either [accept] or [reject] should be called after every [recompile] call.
-  Future<CompilerOutput> reject();
-
-  /// Should be invoked when frontend server compiler should forget what was
-  /// accepted previously so that next call to [recompile] produces complete
-  /// kernel file.
-  void reset();
-
-  /// stop the service normally
-  Future<dynamic> shutdown();
-
-  /// kill the service
-  Future<dynamic> kill();
-}
-
-@visibleForTesting
-class DefaultResidentCompiler implements ResidentCompiler {
-  DefaultResidentCompiler(
+class ResidentCompiler {
+  ResidentCompiler(
     String sdkRoot, {
     this.packageConfigPath,
     this.fileSystemRoots,
@@ -338,11 +271,6 @@ class DefaultResidentCompiler implements ResidentCompiler {
   final String platformDill;
   final bool verbose;
 
-  @override
-  void addFileSystemRoot(String root) {
-    fileSystemRoots.add(root);
-  }
-
   /// The path to the root of the Dart SDK used to compile.
   final String sdkRoot;
 
@@ -353,7 +281,13 @@ class DefaultResidentCompiler implements ResidentCompiler {
   final StreamController<_CompilationRequest> _controller =
       StreamController<_CompilationRequest>();
 
-  @override
+  /// If invoked for the first time, it compiles Dart script identified by
+  /// [mainUri], [invalidatedFiles] list is ignored.
+  /// On successive runs [invalidatedFiles] indicates which files need to be
+  /// recompiled. If [mainUri] is null, previously used [mainUri] entry
+  /// point that is used for recompilation.
+  /// Binary file name is returned if compilation was successful, otherwise
+  /// null is returned.
   Future<CompilerOutput> recompile(Uri mainUri, List<Uri> invalidatedFiles,
       {@required String outputPath,
       @required PackageConfig packageConfig}) async {
@@ -485,7 +419,7 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return _stdoutHandler.compilerOutput.future;
   }
 
-  @override
+  /// Compile dart expression to kernel.
   Future<CompilerOutput> compileExpression(
     String expression,
     List<String> definitions,
@@ -528,7 +462,7 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return _stdoutHandler.compilerOutput.future;
   }
 
-  @override
+  /// Compiles dart expression to JavaScript.
   Future<CompilerOutput> compileExpressionToJs(
       String libraryUri,
       int line,
@@ -577,7 +511,9 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return _stdoutHandler.compilerOutput.future;
   }
 
-  @override
+  /// Should be invoked when results of compilation are accepted by the client.
+  ///
+  /// Either [accept] or [reject] should be called after every [recompile] call.
   void accept() {
     if (_compileRequestNeedsConfirmation) {
       _server.stdin.writeln('accept');
@@ -586,7 +522,9 @@ class DefaultResidentCompiler implements ResidentCompiler {
     _compileRequestNeedsConfirmation = false;
   }
 
-  @override
+  /// Should be invoked when results of compilation are rejected by the client.
+  ///
+  /// Either [accept] or [reject] should be called after every [recompile] call.
   Future<CompilerOutput> reject() {
     if (!_controller.hasListener) {
       _controller.stream.listen(_handleCompilationRequest);
@@ -608,7 +546,9 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return _stdoutHandler.compilerOutput.future;
   }
 
-  @override
+  /// Should be invoked when frontend server compiler should forget what was
+  /// accepted previously so that next call to [recompile] produces complete
+  /// kernel file.
   void reset() {
     _server?.stdin?.writeln('reset');
     _logger.info('<- reset');
@@ -620,7 +560,7 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return _server.exitCode;
   }
 
-  @override
+  /// stop the service normally
   Future<dynamic> shutdown() async {
     // Server was never successfully created.
     if (_server == null) {
@@ -629,7 +569,7 @@ class DefaultResidentCompiler implements ResidentCompiler {
     return quit();
   }
 
-  @override
+  /// kill the service
   Future<dynamic> kill() async {
     if (_server == null) {
       return 0;
diff --git a/frontend_server_common/lib/src/resident_runner.dart b/frontend_server_common/lib/src/resident_runner.dart
index f5329ebe9..81c90c3cf 100644
--- a/frontend_server_common/lib/src/resident_runner.dart
+++ b/frontend_server_common/lib/src/resident_runner.dart
@@ -13,9 +13,7 @@ import 'package:dwds/dwds.dart';
 import 'package:logging/logging.dart';
 import 'package:path/path.dart' as p;
 
-import 'asset.dart';
 import 'devfs.dart';
-import 'devfs_content.dart';
 import 'frontend_server_client.dart';
 import 'utilities.dart';
 
@@ -56,7 +54,6 @@ class ResidentWebRunner {
 
   ResidentCompiler generator;
   ExpressionCompiler expressionCompiler;
-  AssetBundle assetBundle;
   WebDevFS devFS;
   Uri uri;
   Iterable<String> modules;
@@ -64,8 +61,6 @@ class ResidentWebRunner {
   Future<int> run(String hostname, int port, String root) async {
     hostname ??= 'localhost';
 
-    assetBundle = AssetBundleFactory.defaultInstance.createBundle();
-
     devFS = WebDevFS(
       fileSystem: fileSystem,
       hostname: hostname,
@@ -90,14 +85,8 @@ class ResidentWebRunner {
   }
 
   Future<UpdateFSReport> _updateDevFS() async {
-    var result = await assetBundle.build();
-    if (result != 0) {
-      return UpdateFSReport(success: false);
-    }
-
     var report = await devFS.update(
         mainPath: mainPath,
-        bundle: assetBundle,
         dillOutputPath: outputPath,
         generator: generator,
         invalidatedFiles: []);
diff --git a/frontend_server_common/lib/src/utilities.dart b/frontend_server_common/lib/src/utilities.dart
index 9ca429eff..801cc600b 100644
--- a/frontend_server_common/lib/src/utilities.dart
+++ b/frontend_server_common/lib/src/utilities.dart
@@ -20,6 +20,5 @@ final String _sdkDir = (() {
 })();
 
 final String dartSdkPath = _sdkDir;
-final String dartPath = p.join(_sdkDir, 'bin', 'dart');
 
 const fs.FileSystem fileSystem = LocalFileSystem();