Remove generated directories with 100s of files.

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

Index: client/dom/generated/src/interface/NavigatorUserMediaError.dart
diff --git a/client/dom/generated/src/interface/NavigatorUserMediaError.dart b/client/dom/generated/src/interface/NavigatorUserMediaError.dart
deleted file mode 100644
index e8106e879a92e06097af30022560465865a449ca..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/interface/NavigatorUserMediaError.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 NavigatorUserMediaError {
-
-  static final int PERMISSION_DENIED = 1;
-
-  final int code;
-}