Remove es-module-shims and wp-importmap-polyfill (#65210)

These are no longer used in Core or Gutenberg.

See https://core.trac.wordpress.org/ticket/60970.

This only seems to have existed in the 6.5 compat directory, removed in #64096.

---

Co-authored-by: sirreal <[email protected]>
Co-authored-by: swissspidy <[email protected]>

package.json

@@ -91,8 +91,7 @@
 		"@wordpress/viewport": "file:packages/viewport",
 		"@wordpress/warning": "file:packages/warning",
 		"@wordpress/widgets": "file:packages/widgets",
-		"@wordpress/wordcount": "file:packages/wordcount",
-		"es-module-shims": "^1.8.2"
+		"@wordpress/wordcount": "file:packages/wordcount"
 	},
 	"devDependencies": {
 		"@actions/core": "1.9.1",

tools/webpack/interactivity.js

@@ -2,7 +2,7 @@
  * External dependencies
  */
 const { join } = require( 'path' );
-const CopyWebpackPlugin = require( 'copy-webpack-plugin' );
+
 /**
  * WordPress dependencies
  */
@@ -66,19 +66,7 @@ module.exports = {
 			},
 		],
 	},
-	plugins: [
-		...plugins,
-		// TODO: Move it to a different Webpack file.
-		new CopyWebpackPlugin( {
-			patterns: [
-				{
-					from: './node_modules/es-module-shims/dist/es-module-shims.wasm.js',
-					to: './build/modules/importmap-polyfill.min.js',
-				},
-			],
-		} ),
-		new DependencyExtractionWebpackPlugin(),
-	],
+	plugins: [ ...plugins, new DependencyExtractionWebpackPlugin() ],
 	watchOptions: {
 		ignored: [ '**/node_modules' ],
 		aggregateTimeout: 500,