Removed support for Internet Explorer

src/core/Expectation.js

@@ -75,15 +75,8 @@ getJasmineRequireObj().Expectation = function(j$) {
    * @namespace async-matchers
    */
   function AsyncExpectation(options) {
-    var global = options.global || j$.getGlobal();
     this.expector = new j$.Expector(options);
 
-    if (!global.Promise) {
-      throw new Error(
-        'expectAsync is unavailable because the environment does not support promises.'
-      );
-    }
-
     var customAsyncMatchers = options.customAsyncMatchers || {};
     for (var matcherName in customAsyncMatchers) {
       this[matcherName] = wrapAsyncCompare(