Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/pubsubstateclient.cc

-/*
- *  Copyright 2011 The WebRTC Project Authors. All rights reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/libjingle/xmpp/pubsubstateclient.h"
-
-namespace buzz {
-
-std::string PublishedNickKeySerializer::GetKey(
-    const std::string& publisher_nick, const std::string& published_nick) {
-  return published_nick;
-}
-
-std::string PublisherAndPublishedNicksKeySerializer::GetKey(
-    const std::string& publisher_nick, const std::string& published_nick) {
-  return publisher_nick + ":" + published_nick;
-}
-
-}  // namespace buzz