Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_SVGAnimatedStringWrappingImplementation.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 _SVGAnimatedStringWrappingImplementation extends DOMWrapperBase implements SVGAnimatedString {
-  _SVGAnimatedStringWrappingImplementation() : super() {}
-
-  static create__SVGAnimatedStringWrappingImplementation() native {
-    return new _SVGAnimatedStringWrappingImplementation();
-  }
-
-  String get animVal() { return _get_animVal(this); }
-  static String _get_animVal(var _this) native;
-
-  String get baseVal() { return _get_baseVal(this); }
-  static String _get_baseVal(var _this) native;
-
-  void set baseVal(String value) { _set_baseVal(this, value); }
-  static void _set_baseVal(var _this, String value) native;
-
-  String get typeName() { return "SVGAnimatedString"; }
-}