RTPReceiverAudio: Removed frequency from CNGPayloadType and cleaned up

webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
index 9f6d80ae0a6c0ccab2cea17323cd03912ebd5271..90e19c06459ad7c24a3230c53803b835e1755b02 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_receiver_video.cc
@@ -108,10 +108,6 @@ int32_t RTPReceiverVideo::ParseRtpPacket(WebRtcRTPHeader* rtp_header,
              : -1;
 }
 
-int RTPReceiverVideo::GetPayloadTypeFrequency() const {
-  return kVideoPayloadTypeFrequency;
-}
-
 RTPAliveType RTPReceiverVideo::ProcessDeadOrAlive(
     uint16_t last_payload_length) const {
   return kRtpDead;