Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/HTMLLegendElement.dart
diff --git a/client/dom/generated/src/interface/HTMLLegendElement.dart b/client/dom/generated/src/interface/HTMLLegendElement.dart
deleted file mode 100644
index e0e05520c4021d8c7bc85831b3c1cb65f8048121..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/HTMLLegendElement.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 HTMLLegendElement extends HTMLElement {
-
-  String align;
-
-  final HTMLFormElement form;
-}