Remove generated directories with 100s of files.

client/html/generated/html/interface/File.dart

Index: client/html/generated/html/interface/File.dart
diff --git a/client/html/generated/html/interface/File.dart b/client/html/generated/html/interface/File.dart
deleted file mode 100644
index dcf99c17aee9661cc49ee7f552aa1b633b7aab7a..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/File.dart
+++ /dev/null
@@ -1,18 +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 File extends Blob {
-
-  final String fileName;
-
-  final int fileSize;
-
-  final Date lastModifiedDate;
-
-  final String name;
-
-  final String webkitRelativePath;
-}