app/assets/javascripts/highcharts/modules/drilldown.js in highcharts-rails-5.0.3 vs app/assets/javascripts/highcharts/modules/drilldown.js in highcharts-rails-5.0.4

@@ -1,7 +1,7 @@
 /**
- * @license Highcharts JS v5.0.3 (2016-11-18)
+ * @license Highcharts JS v5.0.4 (2016-11-25)
  * Highcharts Drilldown module
  * 
  * Author: Torstein Honsi
  * License: www.highcharts.com/license
  *
@@ -20,10 +20,9 @@
          * Author: Torstein Honsi
          * License: www.highcharts.com/license
          *
          */
 
-        'use strict';
 
         var noop = H.noop,
             color = H.color,
             defaultOptions = H.defaultOptions,
             each = H.each,