@angular/cli migration - update-karma-main-file

Remove no longer needed require calls in Karma builder main file.

Author: robertIsaac

src/test.ts

@@ -7,21 +7,10 @@ import {
   platformBrowserDynamicTesting
 } from '@angular/platform-browser-dynamic/testing';
 
-declare const require: {
-  context(path: string, deep?: boolean, filter?: RegExp): {
-    keys(): string[];
-    <T>(id: string): T;
-  };
-};
-
 // First, initialize the Angular testing environment.
 getTestBed().initTestEnvironment(
   BrowserDynamicTestingModule,
   platformBrowserDynamicTesting(), {
     teardown: { destroyAfterEach: false }
 }
 );
-// Then we find all the tests.
-const context = require.context('./', true, /\.spec\.ts$/);
-// And load the modules.
-context.keys().map(context);