[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/entanglement/test/ControlledPromise.js

@@ -19,7 +19,6 @@
  * this source code distribution or the Licensing information page available
  * at runtime from the About dialog for additional information.
  *****************************************************************************/
-/*global spyOn*/
 define(
     function () {