Remove generated directories with 100s of files.

client/html/generated/html/interface/CharacterData.dart

Index: client/html/generated/html/interface/CharacterData.dart
diff --git a/client/html/generated/html/interface/CharacterData.dart b/client/html/generated/html/interface/CharacterData.dart
deleted file mode 100644
index 35c3699c8a3c3bd414b50f8adfe13afad59f69e2..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/CharacterData.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 CharacterData extends Node {
-
-  String data;
-
-  final int length;
-
-  void appendData(String data);
-
-  void deleteData(int offset, int length);
-
-  void insertData(int offset, String data);
-
-  void replaceData(int offset, int length, String data);
-
-  String substringData(int offset, int length);
-}