Remove generated directories with 100s of files.

client/dom/generated/src/frog/_SharedWorkerFactoryProvider.dart

Index: client/dom/generated/src/frog/_SharedWorkerFactoryProvider.dart
diff --git a/client/dom/generated/src/frog/_SharedWorkerFactoryProvider.dart b/client/dom/generated/src/frog/_SharedWorkerFactoryProvider.dart
deleted file mode 100644
index 64fcc7877f0c24bffe2703fcb92d2ad4fcef8a9a..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/_SharedWorkerFactoryProvider.dart
+++ /dev/null
@@ -1,11 +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.
-
-class _SharedWorkerFactoryProvider {
-  factory SharedWorker(String scriptURL, [String name]) native
-'''
-if (name == null) return new SharedWorker(scriptURL);
-return new SharedWorker(scriptURL, name);
-''';
-}