Remove generated directories with 100s of files.

client/dom/generated/src/wrapping/_DataTransferItemWrappingImplementation.dart

Index: client/dom/generated/src/wrapping/_DataTransferItemWrappingImplementation.dart
diff --git a/client/dom/generated/src/wrapping/_DataTransferItemWrappingImplementation.dart b/client/dom/generated/src/wrapping/_DataTransferItemWrappingImplementation.dart
deleted file mode 100644
index d77ccab2e601ff9d4221e9c79f0cc4922bddcaea..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/wrapping/_DataTransferItemWrappingImplementation.dart
+++ /dev/null
@@ -1,32 +0,0 @@
-// 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 _DataTransferItemWrappingImplementation extends DOMWrapperBase implements DataTransferItem {
-  _DataTransferItemWrappingImplementation() : super() {}
-
-  static create__DataTransferItemWrappingImplementation() native {
-    return new _DataTransferItemWrappingImplementation();
-  }
-
-  String get kind() { return _get_kind(this); }
-  static String _get_kind(var _this) native;
-
-  String get type() { return _get_type(this); }
-  static String _get_type(var _this) native;
-
-  Blob getAsFile() {
-    return _getAsFile(this);
-  }
-  static Blob _getAsFile(receiver) native;
-
-  void getAsString([StringCallback callback = null]) {
-    _getAsString(this, callback);
-    return;
-  }
-  static void _getAsString(receiver, callback) native;
-
-  String get typeName() { return "DataTransferItem"; }
-}