Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/DocumentType.dart
diff --git a/client/dom/generated/src/interface/DocumentType.dart b/client/dom/generated/src/interface/DocumentType.dart
deleted file mode 100644
index bdd6e2dc8db24da56c59ff63d7a19a36d6b99491..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/DocumentType.dart
+++ /dev/null
@@ -1,20 +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 DocumentType extends Node {
-
-  final NamedNodeMap entities;
-
-  final String internalSubset;
-
-  final String name;
-
-  final NamedNodeMap notations;
-
-  final String publicId;
-
-  final String systemId;
-}