Revert "Merge branch 'fix-ide-web-worker-relative-url' into 'master'"

This reverts merge request !26015

app/assets/javascripts/lib/utils/webpack.js

@@ -6,5 +6,11 @@ export function resetServiceWorkersPublicPath() {
   // see: https://webpack.js.org/guides/public-path/
   const relativeRootPath = (gon && gon.relative_url_root) || '';
   const webpackAssetPath = `${relativeRootPath}/assets/webpack/`;
+  __webpack_public_path__ = webpackAssetPath; // eslint-disable-line camelcase
+
+  // monaco-editor-webpack-plugin currently (incorrectly) references the
+  // public path as a property of `window`.  Once this is fixed upstream we
+  // can remove this line
+  // see: https://github.com/Microsoft/monaco-editor-webpack-plugin/pull/63
   window.__webpack_public_path__ = webpackAssetPath; // eslint-disable-line
 }