Remove unnecessary 'use strict' lines and add hygiene check (#5363)

* Remove unnecessary 'use strict' lines and add hygiene check for them

* Move check to under tslint filters to reduce number of filters needed

* Only take first 10 lines of file

src/sql/workbench/parts/notebook/outputs/widgets.ts

@@ -2,7 +2,6 @@
  *  Copyright (c) Microsoft Corporation. All rights reserved.
  *  Licensed under the Source EULA. See License.txt in the project root for license information.
  *--------------------------------------------------------------------------------------------*/
-'use strict';
 
 import * as renderers from './renderers';
 import { IRenderMime } from './common/renderMimeInterfaces';