Remove unneeded goog.provides/requires for typedefs

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

src/ol/imagetile.js

@@ -2,8 +2,6 @@ goog.provide('ol.ImageTile');
 
 goog.require('goog.asserts');
 goog.require('ol.Tile');
-goog.require('ol.TileCoord');
-goog.require('ol.TileLoadFunctionType');
 goog.require('ol.TileState');
 goog.require('ol.events');
 goog.require('ol.events.EventType');