fix(@schematics/angular): Consolidated setup with a single beforeEach()

Since f463c84 we use native `async`/`await` and thus we do not need
to split setup in two `beforeEach()`

Author: PowerKiKi

packages/schematics/angular/component/files/__name@dasherize@if-flat__/__name@dasherize__.__type@dasherize__.spec.ts.template

@@ -11,9 +11,7 @@ describe('<%= classify(name) %><%= classify(type) %>', () => {
       declarations: [ <%= classify(name) %><%= classify(type) %> ]
     })
     .compileComponents();
-  });
 
-  beforeEach(() => {
     fixture = TestBed.createComponent(<%= classify(name) %><%= classify(type) %>);
     component = fixture.componentInstance;
     fixture.detectChanges();