Remove unneeded type cast from examples

examples/custom-controls.js

@@ -59,9 +59,9 @@ ol.inherits(app.RotateNorthControl, ol.control.Control);
 
 var map = new ol.Map({
   controls: ol.control.defaults({
-    attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
+    attributionOptions: {
       collapsible: false
-    })
+    }
   }).extend([
     new app.RotateNorthControl()
   ]),