Remove generated directories with 100s of files.

client/html/generated/html/interface/UIEvent.dart

Index: client/html/generated/html/interface/UIEvent.dart
diff --git a/client/html/generated/html/interface/UIEvent.dart b/client/html/generated/html/interface/UIEvent.dart
deleted file mode 100644
index 4efe1c6f03816f90a827710c9e19ef66e1a760ff..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/UIEvent.dart
+++ /dev/null
@@ -1,28 +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 UIEvent extends Event {
-
-  final int charCode;
-
-  final int detail;
-
-  final int keyCode;
-
-  final int layerX;
-
-  final int layerY;
-
-  final int pageX;
-
-  final int pageY;
-
-  final Window view;
-
-  final int which;
-
-  void initUIEvent(String type, bool canBubble, bool cancelable, Window view, int detail);
-}