Remove generated directories with 100s of files.

client/html/generated/html/interface/DedicatedWorkerContext.dart

Index: client/html/generated/html/interface/DedicatedWorkerContext.dart
diff --git a/client/html/generated/html/interface/DedicatedWorkerContext.dart b/client/html/generated/html/interface/DedicatedWorkerContext.dart
deleted file mode 100644
index 6a3ed26815eba45e5969dc9ce28ff8c6ccd025ca..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/DedicatedWorkerContext.dart
+++ /dev/null
@@ -1,14 +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 DedicatedWorkerContext extends WorkerContext {
-
-  EventListener onmessage;
-
-  void postMessage(Object message, [List messagePorts]);
-
-  void webkitPostMessage(Object message, [List transferList]);
-}