Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_HTMLTableColElementWrappingImplementation.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 _HTMLTableColElementWrappingImplementation extends _HTMLElementWrappingImplementation implements HTMLTableColElement {
-  _HTMLTableColElementWrappingImplementation() : super() {}
-
-  static create__HTMLTableColElementWrappingImplementation() native {
-    return new _HTMLTableColElementWrappingImplementation();
-  }
-
-  String get align() { return _get_align(this); }
-  static String _get_align(var _this) native;
-
-  void set align(String value) { _set_align(this, value); }
-  static void _set_align(var _this, String value) native;
-
-  String get ch() { return _get_ch(this); }
-  static String _get_ch(var _this) native;
-
-  void set ch(String value) { _set_ch(this, value); }
-  static void _set_ch(var _this, String value) native;
-
-  String get chOff() { return _get_chOff(this); }
-  static String _get_chOff(var _this) native;
-
-  void set chOff(String value) { _set_chOff(this, value); }
-  static void _set_chOff(var _this, String value) native;
-
-  int get span() { return _get_span(this); }
-  static int _get_span(var _this) native;
-
-  void set span(int value) { _set_span(this, value); }
-  static void _set_span(var _this, int value) native;
-
-  String get vAlign() { return _get_vAlign(this); }
-  static String _get_vAlign(var _this) native;
-
-  void set vAlign(String value) { _set_vAlign(this, value); }
-  static void _set_vAlign(var _this, String value) native;
-
-  String get width() { return _get_width(this); }
-  static String _get_width(var _this) native;
-
-  void set width(String value) { _set_width(this, value); }
-  static void _set_width(var _this, String value) native;
-
-  String get typeName() { return "HTMLTableColElement"; }
-}