Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/ProcessingInstruction.dart
diff --git a/client/dom/generated/src/interface/ProcessingInstruction.dart b/client/dom/generated/src/interface/ProcessingInstruction.dart
deleted file mode 100644
index 8c82aee3fa7bff196572722bd8813a900fe417e3..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/ProcessingInstruction.dart
+++ /dev/null
@@ -1,14 +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 ProcessingInstruction extends Node {
-
-  String data;
-
-  final StyleSheet sheet;
-
-  final String target;
-}