undo copyright comment change

Author: dcharkes

pkgs/native_assets_cli/lib/src/api/build.dart

@@ -1,6 +1,6 @@
 // Copyright (c) 2024, the Dart project authors.  Please see the AUTHORS file
-/// for details. All rights reserved. Use of this source code is governed by a
-/// BSD-style license that can be found in the LICENSE file.
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
 
 import 'build_config.dart';
 import 'build_output.dart';