Remove generated directories with 100s of files.

client/dom/generated/src/interface/XMLSerializer.dart

Index: client/dom/generated/src/interface/XMLSerializer.dart
diff --git a/client/dom/generated/src/interface/XMLSerializer.dart b/client/dom/generated/src/interface/XMLSerializer.dart
deleted file mode 100644
index b1810f3ac1507aa242745d6165b8f9e6df106a7f..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/XMLSerializer.dart
+++ /dev/null
@@ -1,12 +0,0 @@
-// Copyright (c) 2012, 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.
-
-interface XMLSerializer default _XMLSerializerFactoryProvider {
-
-  XMLSerializer();
-
-  String serializeToString(Node node);
-}