[Build] Remove boilerplate from scripts

No longer necessary after JSHint configuration.

platform/features/plot/src/modes/PlotModeOptions.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*/
 
 define(
     ["./PlotOverlayMode", "./PlotStackMode"],
     function (PlotOverlayMode, PlotStackMode) {
-        "use strict";
 
         var STACKED = {
                 key: "stacked",