Revert "Restore support for IE8"

This reverts commit c33ac5fdb4.

This must be fixed upstream.

Merged by mistake.

Change-Id: I0ebf6a80c693e01bdb6eba971f44b9fb402a8f32

lib/jquery.uls/src/jquery.uls.core.js

@@ -354,25 +354,13 @@
 		 * @return string
 		 */
 		getMenuWidth: function () {
-			var language, languagesCount = 0;
+			var languagesCount;
 
 			if ( this.options.menuWidth ) {
 				return this.options.menuWidth;
 			}
 
-			// IE8 does not support Object.keys
-			if ( Object.keys ) {
 			languagesCount = Object.keys( this.options.languages ).length;
-			} else {
-				for ( language in this.options.languages ) {
-					if ( Object.prototype.hasOwnProperty.call(
-						this.options.languages,
-						language
-					) ) {
-						languagesCount++;
-					}
-				}
-			}
 
 			if ( languagesCount < 12 ) {
 				return 'narrow';