Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/WebKitAnimationEvent.dart
diff --git a/client/dom/generated/src/interface/WebKitAnimationEvent.dart b/client/dom/generated/src/interface/WebKitAnimationEvent.dart
deleted file mode 100644
index 98c72c1d28a5b4d555bf7284dabf9f7b3d8dee3a..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/WebKitAnimationEvent.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 WebKitAnimationEvent extends Event {
-
-  final String animationName;
-
-  final num elapsedTime;
-}