Remove RtpRtcp::RemoteRTCPStat(RTCPSenderInfo*) as unused

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 169 matching lines @@
 
   void GetSendStreamDataCounters(
       StreamDataCounters* rtp_counters,
       StreamDataCounters* rtx_counters) const override;
 
   void GetRtpPacketLossStats(
       bool outgoing,
       uint32_t ssrc,
       struct RtpPacketLossStats* loss_stats) const override;
 
-  // Get received RTCP report, sender info.
-  int32_t RemoteRTCPStat(RTCPSenderInfo* sender_info) override;
-
   // Get received RTCP report, report block.
   int32_t RemoteRTCPStat(
       std::vector<RTCPReportBlock>* receive_blocks) const override;
 
   // (REMB) Receiver Estimated Max Bitrate.
   bool REMB() const override;
 
   void SetREMBStatus(bool enable) override;
 
   void SetREMBData(uint32_t bitrate,
@@ skipping 155 matching lines @@
   PacketLossStats receive_loss_stats_;
 
   // The processed RTT from RtcpRttStats.
   rtc::CriticalSection critical_section_rtt_;
   int64_t rtt_ms_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_RTCP_IMPL_H_