fix(@angular-devkit/build-angular): allow Workers in Stackblitz

This is no longer needed as Stackblitz implemented the missing Node.Js worker APIs.

(cherry picked from commit 2ab7742)

Author: alan-agius4

packages/angular_devkit/build_angular/src/webpack/configs/styles.ts

@@ -107,16 +107,14 @@ export function getStylesConfig(wco: WebpackConfigOptions): Configuration {
     );
   }
 
-  const sassImplementation = getSassImplementation();
-  if (sassImplementation instanceof SassWorkerImplementation) {
-    extraPlugins.push({
-      apply(compiler) {
-        compiler.hooks.shutdown.tap('sass-worker', () => {
-          sassImplementation?.close();
-        });
-      },
-    });
-  }
+  const sassImplementation = new SassWorkerImplementation();
+  extraPlugins.push({
+    apply(compiler) {
+      compiler.hooks.shutdown.tap('sass-worker', () => {
+        sassImplementation.close();
+      });
+    },
+  });
 
   const assetNameTemplate = assetNameTemplateFactory(hashFormat);
 
@@ -403,14 +401,3 @@ export function getStylesConfig(wco: WebpackConfigOptions): Configuration {
     plugins: extraPlugins,
   };
 }
-
-function getSassImplementation(): SassWorkerImplementation | typeof import('sass') {
-  const { webcontainer } = process.versions as unknown as Record<string, unknown>;
-
-  // When `webcontainer` is a truthy it means that we are running in a StackBlitz webcontainer.
-  // `SassWorkerImplementation` uses `receiveMessageOnPort` Node.js `worker_thread` API to ensure sync behavior which is ~2x faster.
-  // However, it is non trivial to support this in a webcontainer and while slower we choose to use `dart-sass`
-  // which in Webpack uses the slower async path.
-  // We should periodically check with StackBlitz folks (Mark Whitfeld / Dominic Elm) to determine if this workaround is still needed.
-  return webcontainer ? require('sass') : new SassWorkerImplementation();
-}