Remove generated directories with 100s of files.

client/dom/generated/src/interface/FileWriterSync.dart

Index: client/dom/generated/src/interface/FileWriterSync.dart
diff --git a/client/dom/generated/src/interface/FileWriterSync.dart b/client/dom/generated/src/interface/FileWriterSync.dart
deleted file mode 100644
index 487ca972f27c533de7e2b973a771cb51ffae6c51..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/FileWriterSync.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 FileWriterSync {
-
-  final int length;
-
-  final int position;
-
-  void seek(int position);
-
-  void truncate(int size);
-
-  void write(Blob data);
-}