Remove default ".json" and ".node" resolution for ESM

doc/api/esm.md

@@ -86,7 +86,7 @@ For now, only modules using the `file:` protocol can be loaded.
 
 ## Interop with existing modules
 
-All CommonJS, JSON, and C++ modules can be used with `import`.
+CommonJS and C++ modules can be used with `import`.
 
 Modules loaded this way will only be loaded once, even if their query
 or fragment string differs between `import` statements.
@@ -176,7 +176,6 @@ module. This can be one of the following:
 | `'esm'` | Load a standard JavaScript module |
 | `'cjs'` | Load a node-style CommonJS module |
 | `'builtin'` | Load a node builtin CommonJS module |
-| `'json'` | Load a JSON file |
 | `'addon'` | Load a [C++ Addon][addons] |
 | `'dynamic'` | Use a [dynamic instantiate hook][] |
 

lib/internal/modules/esm/default_resolve.js

@@ -46,8 +46,6 @@ function search(target, base) {
 const extensionFormatMap = {
   '__proto__': null,
   '.mjs': 'esm',
-  '.json': 'json',
-  '.node': 'addon',
   '.js': 'cjs'
 };
 

lib/internal/modules/esm/translators.js

@@ -3,22 +3,18 @@
 const { NativeModule, internalBinding } = require('internal/bootstrap/loaders');
 const { ModuleWrap } = internalBinding('module_wrap');
 const {
-  stripShebang,
-  stripBOM
+  stripShebang
 } = require('internal/modules/cjs/helpers');
 const CJSModule = require('internal/modules/cjs/loader');
 const internalURLModule = require('internal/url');
 const createDynamicModule = require(
   'internal/modules/esm/create_dynamic_module');
 const fs = require('fs');
-const { _makeLong } = require('path');
 const { SafeMap } = require('internal/safe_globals');
 const { URL } = require('url');
 const { debuglog, promisify } = require('util');
 const readFileAsync = promisify(fs.readFile);
-const readFileSync = fs.readFileSync;
 const StringReplace = Function.call.bind(String.prototype.replace);
-const JsonParse = JSON.parse;
 
 const debug = debuglog('esm');
 
@@ -74,32 +70,3 @@ translators.set('builtin', async (url) => {
       reflect.exports.default.set(module.exports);
     });
 });
-
-// Strategy for loading a node native module
-translators.set('addon', async (url) => {
-  debug(`Translating NativeModule ${url}`);
-  return createDynamicModule(['default'], url, (reflect) => {
-    debug(`Loading NativeModule ${url}`);
-    const module = { exports: {} };
-    const pathname = internalURLModule.fileURLToPath(new URL(url));
-    process.dlopen(module, _makeLong(pathname));
-    reflect.exports.default.set(module.exports);
-  });
-});
-
-// Strategy for loading a JSON file
-translators.set('json', async (url) => {
-  debug(`Translating JSONModule ${url}`);
-  return createDynamicModule(['default'], url, (reflect) => {
-    debug(`Loading JSONModule ${url}`);
-    const pathname = internalURLModule.fileURLToPath(new URL(url));
-    const content = readFileSync(pathname, 'utf8');
-    try {
-      const exports = JsonParse(stripBOM(content));
-      reflect.exports.default.set(exports);
-    } catch (err) {
-      err.message = pathname + ': ' + err.message;
-      throw err;
-    }
-  });
-});