Remove unneeded goog.provides/requires for typedefs

In general, typedefs do not need and should not have goog.require/provide

src/ol/control/zoomslidercontrol.js

@@ -9,7 +9,6 @@ goog.require('ol.events');
 goog.require('ol.events.Event');
 goog.require('ol.events.EventType');
 goog.require('ol.pointer.PointerEventHandler');
-goog.require('ol.Size');
 goog.require('ol.ViewHint');
 goog.require('ol.animation');
 goog.require('ol.control.Control');