Remove generated directories with 100s of files.

client/html/generated/html/interface/DOMTokenList.dart

Index: client/html/generated/html/interface/DOMTokenList.dart
diff --git a/client/html/generated/html/interface/DOMTokenList.dart b/client/html/generated/html/interface/DOMTokenList.dart
deleted file mode 100644
index 08c7a15fd41e6e651869249fe81c9de7307739c4..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/DOMTokenList.dart
+++ /dev/null
@@ -1,22 +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 DOMTokenList {
-
-  final int length;
-
-  void add(String token);
-
-  bool contains(String token);
-
-  String item(int index);
-
-  void remove(String token);
-
-  String toString();
-
-  bool toggle(String token);
-}