Remove duplicate blank lines at the start of some extension src files

extensions/css-language-features/server/src/utils/documentContext.ts

@@ -3,8 +3,6 @@
  *  Licensed under the MIT License. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
 
-
-
 import { DocumentContext } from 'vscode-css-languageservice';
 import { endsWith, startsWith } from '../utils/strings';
 import * as url from 'url';