Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_ScreenWrappingImplementation.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 _ScreenWrappingImplementation extends DOMWrapperBase implements Screen {
-  _ScreenWrappingImplementation() : super() {}
-
-  static create__ScreenWrappingImplementation() native {
-    return new _ScreenWrappingImplementation();
-  }
-
-  int get availHeight() { return _get_availHeight(this); }
-  static int _get_availHeight(var _this) native;
-
-  int get availLeft() { return _get_availLeft(this); }
-  static int _get_availLeft(var _this) native;
-
-  int get availTop() { return _get_availTop(this); }
-  static int _get_availTop(var _this) native;
-
-  int get availWidth() { return _get_availWidth(this); }
-  static int _get_availWidth(var _this) native;
-
-  int get colorDepth() { return _get_colorDepth(this); }
-  static int _get_colorDepth(var _this) native;
-
-  int get height() { return _get_height(this); }
-  static int _get_height(var _this) native;
-
-  int get pixelDepth() { return _get_pixelDepth(this); }
-  static int _get_pixelDepth(var _this) native;
-
-  int get width() { return _get_width(this); }
-  static int _get_width(var _this) native;
-
-  String get typeName() { return "Screen"; }
-}