Remove duplicate blank lines at the start of some files

src/vs/platform/instantiation/test/common/instantiationServiceMock.ts

@@ -3,7 +3,6 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-
 import * as sinon from 'sinon';
 import { TPromise } from 'vs/base/common/winjs.base';
 import * as types from 'vs/base/common/types';