Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_JavaScriptAudioNodeWrappingImplementation.dart

-// Copyright (c) 2011, 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.
-
-// WARNING: Do not edit - generated code.
-
-class _JavaScriptAudioNodeWrappingImplementation extends _AudioNodeWrappingImplementation implements JavaScriptAudioNode {
-  _JavaScriptAudioNodeWrappingImplementation() : super() {}
-
-  static create__JavaScriptAudioNodeWrappingImplementation() native {
-    return new _JavaScriptAudioNodeWrappingImplementation();
-  }
-
-  int get bufferSize() { return _get_bufferSize(this); }
-  static int _get_bufferSize(var _this) native;
-
-  EventListener get onaudioprocess() { return _get_onaudioprocess(this); }
-  static EventListener _get_onaudioprocess(var _this) native;
-
-  void set onaudioprocess(EventListener value) { _set_onaudioprocess(this, value); }
-  static void _set_onaudioprocess(var _this, EventListener value) native;
-
-  String get typeName() { return "JavaScriptAudioNode"; }
-}