Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/DocumentFragment.dart
diff --git a/client/dom/generated/src/interface/DocumentFragment.dart b/client/dom/generated/src/interface/DocumentFragment.dart
deleted file mode 100644
index ace0712d1bbc68c5c6a4c2c5f03425c677ae6e4e..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/DocumentFragment.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 DocumentFragment extends Node, NodeSelector {
-
-  Element querySelector(String selectors);
-
-  NodeList querySelectorAll(String selectors);
-}