Remove generated directories with 100s of files.

client/html/generated/html/interface/MessageEvent.dart

Index: client/html/generated/html/interface/MessageEvent.dart
diff --git a/client/html/generated/html/interface/MessageEvent.dart b/client/html/generated/html/interface/MessageEvent.dart
deleted file mode 100644
index fa79697fea3a84303c826ffa05fc480d21548f7d..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/MessageEvent.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 MessageEvent extends Event {
-
-  final Object data;
-
-  final String lastEventId;
-
-  final String origin;
-
-  final List ports;
-
-  final Window source;
-
-  void initMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, Window sourceArg, List messagePorts);
-
-  void webkitInitMessageEvent(String typeArg, bool canBubbleArg, bool cancelableArg, Object dataArg, String originArg, String lastEventIdArg, Window sourceArg, List transferables);
-}