test(aio): remove compileComponents from all tests

By reflex we began all component tests with an async `beforeEach` that called `compileComponents`.
In at least one case (`live-example.component.spec.ts`) that led to the `it` tests being async as well.
There is no need to call `.compileComponents` because CLI web pack + plugin inlines all templates and styles.
While `.compileComponents` was harmless, it added complexity and distraction which we should not inflict on future readers and testers.

aio/src/app/embedded/code/code.component.spec.ts

@@ -41,7 +41,7 @@ describe('CodeComponent', () => {
     delete window['prettyPrintOne'];
   });
 
-  beforeEach(async(() => {
+  beforeEach(() => {
     TestBed.configureTestingModule({
       imports: [ MdSnackBarModule, NoopAnimationsModule ],
       declarations: [ CodeComponent, HostComponent ],
@@ -50,9 +50,8 @@ describe('CodeComponent', () => {
         CopierService,
         {provide: Logger, useClass: TestLogger }
      ]
-    })
-    .compileComponents();
-  }));
+    });
+  });
 
   // Must be async because
   // CodeComponent creates PrettyPrintService which async loads `prettify.js`.