chore: typo

Author: SvetoslavTsenov

app/hero/hero-team-builder.component.ts

@@ -5,7 +5,6 @@ import { Heroes } from "./hero.service";
 @Component({
     moduleId: module.id,
     selector: "hero-team-builder",
-    styleUrls: ["./hero-team-builder.component.css"],
     templateUrl: "./hero-team-builder.component.html",
     providers: [Heroes]
 })