Don't use ol.Collection in examples

examples/wms.js

@@ -1,4 +1,3 @@
-goog.require('ol.Collection');
 goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.Map');
@@ -9,7 +8,7 @@ goog.require('ol.source.MapQuestOpenAerial');
 goog.require('ol.source.TiledWMS');
 
 
-var layers = new ol.Collection([
+var layers = [
   new ol.layer.TileLayer({
     source: new ol.source.MapQuestOpenAerial()
   }),
@@ -21,7 +20,7 @@ var layers = new ol.Collection([
       extent: new ol.Extent(-13884991, 2870341, -7455066, 6338219)
     })
   })
-]);
+];
 var map = new ol.Map({
   renderer: ol.RendererHint.CANVAS,
   layers: layers,