Delete support for sending RTCP RPSI and SLI messages.

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
index 5410e4bdd6fcacd51dd18c79c0926da78fdc4376..363526196dc6349123581b92fce61033f0ed9617 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl.cc
@@ -754,10 +754,6 @@ int32_t ModuleRtpRtcpImpl::RequestKeyFrame() {
   return -1;
 }
 
-int32_t ModuleRtpRtcpImpl::SendRTCPSliceLossIndication(uint8_t picture_id) {
-  return rtcp_sender_.SendRTCP(GetFeedbackState(), kRtcpSli, 0, 0, picture_id);
-}
-
 void ModuleRtpRtcpImpl::SetUlpfecConfig(int red_payload_type,
                                         int ulpfec_payload_type) {
   rtp_sender_.SetUlpfecConfig(red_payload_type, ulpfec_payload_type);
@@ -789,11 +785,6 @@ void ModuleRtpRtcpImpl::OnRequestSendReport() {
   SendRTCP(kRtcpSr);
 }
 
-int32_t ModuleRtpRtcpImpl::SendRTCPReferencePictureSelection(
-    const uint64_t picture_id) {
-  return rtcp_sender_.SendRTCP(GetFeedbackState(), kRtcpRpsi, 0, 0, picture_id);
-}
-
 void ModuleRtpRtcpImpl::OnReceivedNack(
     const std::vector<uint16_t>& nack_sequence_numbers) {
   for (uint16_t nack_sequence_number : nack_sequence_numbers) {