Remove generated directories with 100s of files.

client/html/generated/html/interface/EmbedElement.dart

Index: client/html/generated/html/interface/EmbedElement.dart
diff --git a/client/html/generated/html/interface/EmbedElement.dart b/client/html/generated/html/interface/EmbedElement.dart
deleted file mode 100644
index 7b8b0511051dab23683f540a87af9c622ee42f20..0000000000000000000000000000000000000000
--- a/client/html/generated/html/interface/EmbedElement.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 EmbedElement extends Element {
-
-  String align;
-
-  String height;
-
-  String name;
-
-  String src;
-
-  String type;
-
-  String width;
-}