Remove generated directories with 100s of files.

client/dom/generated/src/frog/_PeerConnectionFactoryProvider.dart

Index: client/dom/generated/src/frog/_PeerConnectionFactoryProvider.dart
diff --git a/client/dom/generated/src/frog/_PeerConnectionFactoryProvider.dart b/client/dom/generated/src/frog/_PeerConnectionFactoryProvider.dart
deleted file mode 100644
index 0ad6d516a1d02ee1c7c47395b9dc6fd6161c3e55..0000000000000000000000000000000000000000
--- a/client/dom/generated/src/frog/_PeerConnectionFactoryProvider.dart
+++ /dev/null
@@ -1,8 +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.
-
-class _PeerConnectionFactoryProvider {
-  factory PeerConnection(String serverConfiguration, SignalingCallback signalingCallback) native
-      '''return new PeerConnection(serverConfiguration, signalingCallback);''';
-}