Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_TimeRangesWrappingImplementation.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 _TimeRangesWrappingImplementation extends DOMWrapperBase implements TimeRanges {
-  _TimeRangesWrappingImplementation() : super() {}
-
-  static create__TimeRangesWrappingImplementation() native {
-    return new _TimeRangesWrappingImplementation();
-  }
-
-  int get length() { return _get_length(this); }
-  static int _get_length(var _this) native;
-
-  num end(int index) {
-    return _end(this, index);
-  }
-  static num _end(receiver, index) native;
-
-  num start(int index) {
-    return _start(this, index);
-  }
-  static num _start(receiver, index) native;
-
-  String get typeName() { return "TimeRanges"; }
-}