Revert "refactor: add license header to JS files & format files (#12035)"

This reverts commit 8310c91823.

modules/@angular/http/rollup-testing.config.js

@@ -1,10 +1,3 @@
-/**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
 
 export default {
   entry: '../../../dist/packages-dist/http/testing/index.js',
@@ -21,4 +14,4 @@ export default {
     'rxjs/Subject': 'Rx',
     'rxjs/operator/take': 'Rx.Observable.prototype'
   }
-};
+}