Remove generated directories with 100s of files.

client/html/generated/html/interface/FileEntry.dart

Index: client/html/generated/html/interface/FileEntry.dart
diff --git a/client/html/generated/html/interface/FileEntry.dart b/client/html/generated/html/interface/FileEntry.dart
deleted file mode 100644
index ddca3d5a3baa9e2009d2f9fe15d454edb4318c6b..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/FileEntry.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 FileEntry extends Entry {
-
-  void createWriter(FileWriterCallback successCallback, [ErrorCallback errorCallback]);
-
-  void file(FileCallback successCallback, [ErrorCallback errorCallback]);
-}