Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_SharedWorkerContextWrappingImplementation.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 _SharedWorkerContextWrappingImplementation extends _WorkerContextWrappingImplementation implements SharedWorkerContext {
-  _SharedWorkerContextWrappingImplementation() : super() {}
-
-  static create__SharedWorkerContextWrappingImplementation() native {
-    return new _SharedWorkerContextWrappingImplementation();
-  }
-
-  String get name() { return _get_name(this); }
-  static String _get_name(var _this) native;
-
-  EventListener get onconnect() { return _get_onconnect(this); }
-  static EventListener _get_onconnect(var _this) native;
-
-  void set onconnect(EventListener value) { _set_onconnect(this, value); }
-  static void _set_onconnect(var _this, EventListener value) native;
-
-  String get typeName() { return "SharedWorkerContext"; }
-}