Cast: Remove unused RTCP messages

media/cast/net/rtcp/rtcp_defines.h

Index: media/cast/net/rtcp/rtcp_defines.h
diff --git a/media/cast/net/rtcp/rtcp_defines.h b/media/cast/net/rtcp/rtcp_defines.h
index 0207edc7ddb029e585f5c5c840e802adb241a72e..92dced3008f1175e5bff7a8bc6294776f9619045 100644
--- a/media/cast/net/rtcp/rtcp_defines.h
+++ b/media/cast/net/rtcp/rtcp_defines.h
@@ -59,15 +59,6 @@ struct RtcpReceiverFrameLogMessage {
 
 typedef std::list<RtcpReceiverFrameLogMessage> RtcpReceiverLogMessage;
 
-struct RtcpRpsiMessage {
-  RtcpRpsiMessage();
-  ~RtcpRpsiMessage();
-
-  uint32 remote_ssrc;
-  uint8 payload_type;
-  uint64 picture_id;
-};
-
 struct RtcpNackMessage {
   RtcpNackMessage();
   ~RtcpNackMessage();
@@ -78,16 +69,6 @@ struct RtcpNackMessage {
   DISALLOW_COPY_AND_ASSIGN(RtcpNackMessage);
 };
 
-struct RtcpRembMessage {
-  RtcpRembMessage();
-  ~RtcpRembMessage();
-
-  uint32 remb_bitrate;
-  std::list<uint32> remb_ssrcs;
-
-  DISALLOW_COPY_AND_ASSIGN(RtcpRembMessage);
-};
-
 struct RtcpReceiverReferenceTimeReport {
   RtcpReceiverReferenceTimeReport();
   ~RtcpReceiverReferenceTimeReport();