Revert unnecessary change

This change isn't needed when we are depending on global jQuery.

Author: taylor-steve

app/assets/javascripts/spotlight/spotlight.esm.js

@@ -1,6 +1,6 @@
 // Module to add multi-image selector to widget panels
 
-(function($, _){
+(function(){
   $.fn.multiImageSelector = function(image_versions, clickCallback, activeImageId) {
     var changeLink          = $("<a href='javascript:;'>Change</a>"),
         thumbsListContainer = $("<div class='thumbs-list' style='display:none'></div>"),