Remove legacy IE support

src/ol/ol.js

@@ -1,5 +1,3 @@
-goog.require('goog.userAgent');
-
 goog.provide('ol');
 
 
@@ -120,14 +118,6 @@ ol.ENABLE_VECTOR = true;
 ol.ENABLE_WEBGL = true;
 
 
-/**
- * @define {boolean} Support legacy IE (7-8).  Default is `false`.
- *     If set to `true`, `goog.array.ASSUME_NATIVE_FUNCTIONS` must be set
- *     to `false` because legacy IE do not support ECMAScript 5 array functions.
- */
-ol.LEGACY_IE_SUPPORT = false;
-
-
 /**
  * @define {number} The size in pixels of the first atlas image. Default is
  * `256`.
@@ -135,15 +125,6 @@ ol.LEGACY_IE_SUPPORT = false;
 ol.INITIAL_ATLAS_SIZE = 256;
 
 
-/**
- * Whether the current browser is legacy IE
- * @const
- * @type {boolean}
- */
-ol.IS_LEGACY_IE = goog.userAgent.IE &&
-    !goog.userAgent.isVersionOrHigher('9.0') && goog.userAgent.VERSION !== '';
-
-
 /**
  * @define {number} The maximum size in pixels of atlas images. Default is
  * `-1`, meaning it is not used (and `ol.WEBGL_MAX_TEXTURE_SIZE` is