Revert "build: switch example e2e tests to bazel (#28402)" (#28438)

This reverts commit ef78e33560.

PR Close #28438

packages/examples/core/ts/prod_mode/prod_mode_example.ts

@@ -13,10 +13,8 @@ import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 import {MyComponent} from './my_component';
 
 enableProdMode();
-
-@NgModule({imports: [BrowserModule], declarations: [MyComponent], bootstrap: [MyComponent]})
-export class AppModule {
+@NgModule({imports: [BrowserModule], bootstrap: [MyComponent]})
+class AppModule {
 }
-
 platformBrowserDynamic().bootstrapModule(AppModule);
 // #enddocregion