removes old reference, renames method

lib/carto/renderer_js.js

@@ -165,7 +165,7 @@ CartoCSS.prototype = {
         }
     }
   },
-  getIconURLs: function(){
+  getImageURLs: function(){
     return this.imageURLs;
   },
 
@@ -202,7 +202,6 @@ CartoCSS.prototype = {
         var layer = layers[key] = (layers[key] || {
           symbolizers: []
         });
-        this.imageURLs = _getImageURLs(def);
         for(var u = 0; u<def.rules.length; u++){
             if(def.rules[u].name == "marker-file" || def.rules[u].name == "point-file"){
                 var value = def.rules[u].value.value[0].value[0].value.value;