Remove unused libjingle_xmpphelp target.

webrtc/libjingle/xmpp/jingleinfotask.h

-/*
- *  Copyright 2010 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.
- */
-
-#ifndef WEBRTC_LIBJINGLE_XMPP_JINGLEINFOTASK_H_
-#define WEBRTC_LIBJINGLE_XMPP_JINGLEINFOTASK_H_
-
-#include <vector>
-
-#include "webrtc/p2p/client/httpportallocator.h"
-#include "webrtc/libjingle/xmpp/xmppengine.h"
-#include "webrtc/libjingle/xmpp/xmpptask.h"
-#include "webrtc/base/sigslot.h"
-
-namespace buzz {
-
-class JingleInfoTask : public XmppTask {
- public:
-  explicit JingleInfoTask(XmppTaskParentInterface* parent) :
-    XmppTask(parent, XmppEngine::HL_TYPE) {}
-
-  virtual int ProcessStart();
-  void RefreshJingleInfoNow();
-
-  sigslot::signal3<const std::string &,
-                   const std::vector<std::string> &,
-                   const std::vector<rtc::SocketAddress> &>
-                       SignalJingleInfo;
-
- protected:
-  class JingleInfoGetTask;
-  friend class JingleInfoGetTask;
-
-  virtual bool HandleStanza(const XmlElement * stanza);
-};
-}
-
-#endif  // WEBRTC_LIBJINGLE_XMPP_JINGLEINFOTASK_H_