fix: incorrect comment about injection (#83)

This comment is not true. The service is declared with the `providedIn` construct in the service file.

Author: MartoYankov

packages/template-hello-world-ng/src/app/item/items.component.ts

@@ -10,10 +10,6 @@ import { ItemService } from "./item.service";
 export class ItemsComponent implements OnInit {
     items: Array<Item>;
 
-    // This pattern makes use of Angular’s dependency injection implementation to
-    // inject an instance of the ItemService service into this class.
-    // Angular knows about this service because it is included in your app’s main NgModule,
-    // defined in app.module.ts.
     constructor(private itemService: ItemService) { }
 
     ngOnInit(): void {