Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_HTMLTableSectionElementWrappingImplementation.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 _HTMLTableSectionElementWrappingImplementation extends _HTMLElementWrappingImplementation implements HTMLTableSectionElement {
-  _HTMLTableSectionElementWrappingImplementation() : super() {}
-
-  static create__HTMLTableSectionElementWrappingImplementation() native {
-    return new _HTMLTableSectionElementWrappingImplementation();
-  }
-
-  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;
-
-  HTMLCollection get rows() { return _get_rows(this); }
-  static HTMLCollection _get_rows(var _this) 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;
-
-  void deleteRow(int index) {
-    _deleteRow(this, index);
-    return;
-  }
-  static void _deleteRow(receiver, index) native;
-
-  HTMLElement insertRow(int index) {
-    return _insertRow(this, index);
-  }
-  static HTMLElement _insertRow(receiver, index) native;
-
-  String get typeName() { return "HTMLTableSectionElement"; }
-}