docs(aio): Upgrade examples to Angular 6 (#23234)

PR Close #23234

aio/tools/examples/shared/boilerplate/cli/src/test.ts

@@ -7,13 +7,8 @@ import {
   platformBrowserDynamicTesting
 } from '@angular/platform-browser-dynamic/testing';
 
-// Unfortunately there's no typing for the `__karma__` variable. Just declare it as any.
-declare const __karma__: any;
 declare const require: any;
 
-// Prevent Karma from running prematurely.
-__karma__.loaded = function () {};
-
 // First, initialize the Angular testing environment.
 getTestBed().initTestEnvironment(
   BrowserDynamicTestingModule,
@@ -23,5 +18,3 @@ getTestBed().initTestEnvironment(
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
 context.keys().map(context);
-// Finally, start Karma to run the tests.
-__karma__.start();