Removing deprecated events syntax.

sdk/lib/web_audio/dart2js/web_audio_dart2js.dart

Index: sdk/lib/web_audio/dart2js/web_audio_dart2js.dart
diff --git a/sdk/lib/web_audio/dart2js/web_audio_dart2js.dart b/sdk/lib/web_audio/dart2js/web_audio_dart2js.dart
index 68572532e936d4986d59e50a6085366b53948311..6680a44f1e51d019e5475acbfd1309aef1a07784 100644
--- a/sdk/lib/web_audio/dart2js/web_audio_dart2js.dart
+++ b/sdk/lib/web_audio/dart2js/web_audio_dart2js.dart
@@ -180,12 +180,6 @@ class AudioContext extends EventTarget native "*AudioContext" {
   @DocsEditable
   static const EventStreamProvider<Event> completeEvent = const EventStreamProvider<Event>('complete');
 
-  @DocsEditable
-  @DomName('EventTarget.addEventListener, EventTarget.removeEventListener, EventTarget.dispatchEvent')
-  @deprecated
-  AudioContextEvents get on =>
-    new AudioContextEvents(this);
-
   @DomName('AudioContext.activeSourceCount')
   @DocsEditable
   final int activeSourceCount;
@@ -309,16 +303,6 @@ class AudioContext extends EventTarget native "*AudioContext" {
     }
   }
 }
-
-@DocsEditable
-@deprecated
-class AudioContextEvents extends Events {
-  @DocsEditable
-  AudioContextEvents(EventTarget _ptr) : super(_ptr);
-
-  @DocsEditable
-  EventListenerList get complete => this['complete'];
-}
 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.