Make map handle background color changes

src/ol/renderer/maprenderer.js

@@ -52,10 +52,6 @@ ol.renderer.Map = function(container, map) {
    * @type {Array.<number>}
    */
   this.mapListenerKeys_ = [
-    goog.events.listen(
-        map, ol.Object.getChangedEventType(ol.MapProperty.BACKGROUND_COLOR),
-        this.handleBackgroundColorChanged, false, this),
-
     goog.events.listen(
         map, ol.Object.getChangedEventType(ol.MapProperty.LAYERS),
         this.handleLayersChanged, false, this)
@@ -157,12 +153,6 @@ ol.renderer.Map.prototype.getMap = function() {
 };
 
 
-/**
- * Handle background color changed.
- */
-ol.renderer.Map.prototype.handleBackgroundColorChanged = goog.nullFunction;
-
-
 /**
  * @param {ol.CollectionEvent} collectionEvent Collection event.
  * @protected