Remove generated directories with 100s of files.

client/html/generated/html/frog/_TextTrackCueFactoryProvider.dart

Index: client/html/generated/html/frog/_TextTrackCueFactoryProvider.dart
diff --git a/client/html/generated/html/frog/_TextTrackCueFactoryProvider.dart b/client/html/generated/html/frog/_TextTrackCueFactoryProvider.dart
deleted file mode 100644
index d36c99e3de68aa19504fb1c2a0f6ddd1bbc0e1cf..0000000000000000000000000000000000000000
--- a/client/html/generated/html/frog/_TextTrackCueFactoryProvider.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.
-
-class _TextTrackCueFactoryProvider {
-  factory TextTrackCue(String id, num startTime, num endTime, String text,
-                       [String settings, bool pauseOnExit]) native '''
-    if (settings == null)
-      return new TextTrackCue(id, startTime, endTime, text);
-    if (pauseOnExit == null)
-      return new TextTrackCue(id, startTime, endTime, text, settings);
-    return new TextTrackCue(id, startTime, endTime, text, settings, pauseOnExit);
-  ''';
-}