[Build] Remove use strict, global

Remove usages of use strict and global declarations that are
no longer necessary with JSHint configuration, from files
added/changed since #724

platform/features/timeline/test/actions/ExportTimelineAsCSVTaskSpec.js

@@ -19,12 +19,10 @@
  * this source code distribution or the Licensing information page available
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
-/*global define,describe,it,expect,beforeEach,waitsFor,jasmine,window,afterEach*/
 
 define(
     ['../../src/actions/ExportTimelineAsCSVTask'],
     function (ExportTimelineAsCSVTask) {
-        'use strict';
 
         // Note that most responsibility is delegated to helper
         // classes, so testing here is minimal.