Simplify extending CorsSharedWorker

public/app/core/utils/CorsSharedWorker.ts

@@ -4,17 +4,6 @@ export function sharedWorkersSupported() {
   return typeof window.SharedWorker !== 'undefined';
 }
 
-class SharedWorkerNotSupported implements SharedWorker {
-  onerror() {}
-  // @ts-ignore
-  readonly port: MessagePort;
-  dispatchEvent(): boolean {
-    return false;
-  }
-  addEventListener(): void {}
-  removeEventListener(): void {}
-}
-
 /**
  * The base class is created dynamically here to allow later on syntax like:
  * import { CorsSharedWorker as SharedWorker } from '../utils/CorsSharedWorker';
@@ -23,13 +12,10 @@ class SharedWorkerNotSupported implements SharedWorker {
  * It's important to use: new SharedWorker(...) syntax instead of new CorsSharedWorker(...) due to how web-workers
  * are processing workers syntax (more details https://webpack.js.org/guides/web-workers/)
  */
-const BaseSharedWorkerClass = sharedWorkersSupported() ? window.SharedWorker : SharedWorkerNotSupported;
+const BaseSharedWorkerClass = sharedWorkersSupported() ? window.SharedWorker : null;
 
 export class CorsSharedWorker extends BaseSharedWorkerClass {
   constructor(url: URL, options?: WorkerOptions) {
-    if (!sharedWorkersSupported()) {
-      return;
-    }
     // by default, worker inherits HTML document's location and pathname which leads to wrong public path value
     // the CorsWorkerPlugin will override it with the value based on the initial worker chunk, ie.
     //    initial worker chunk: http://host.com/cdn/scripts/worker-123.js