Delete unused member RTCPSender::FeedbackState::send_payload_type.

webrtc/modules/rtp_rtcp/source/rtp_sender.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_sender.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_sender.cc b/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
index 44d6ff88e2062f0c97ea7a10a84f78e72b041053..2fd8b3eff51b14efe27fe3f0c3660234a029a35b 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_sender.cc
@@ -276,16 +276,12 @@ int32_t RTPSender::DeRegisterSendPayload(int8_t payload_type) {
   return 0;
 }
 
+// TODO(nisse): Delete this method, only used internally and by test code.
 void RTPSender::SetSendPayloadType(int8_t payload_type) {
   rtc::CritScope lock(&send_critsect_);
   payload_type_ = payload_type;
 }
 
-int8_t RTPSender::SendPayloadType() const {
-  rtc::CritScope lock(&send_critsect_);
-  return payload_type_;
-}
-
 void RTPSender::SetMaxRtpPacketSize(size_t max_packet_size) {
   // Sanity check.
   RTC_DCHECK(max_packet_size >= 100 && max_packet_size <= IP_PACKET_SIZE)