Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/HTMLParamElement.dart
diff --git a/client/dom/generated/src/interface/HTMLParamElement.dart b/client/dom/generated/src/interface/HTMLParamElement.dart
deleted file mode 100644
index 54a455557e0934d33f3452f54c5747ab33b0d061..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/HTMLParamElement.dart
+++ /dev/null
@@ -1,16 +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 HTMLParamElement extends HTMLElement {
-
-  String name;
-
-  String type;
-
-  String value;
-
-  String valueType;
-}