Remove unneeded goog.provides/requires for typedefs

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

src/ol/renderer/webgl/webglimagelayerrenderer.js

@@ -3,8 +3,6 @@ goog.provide('ol.renderer.webgl.ImageLayer');
 goog.require('goog.asserts');
 goog.require('goog.vec.Mat4');
 goog.require('goog.webgl');
-goog.require('ol.Coordinate');
-goog.require('ol.Extent');
 goog.require('ol.ImageBase');
 goog.require('ol.ViewHint');
 goog.require('ol.dom');