Remove channel ids from various interfaces.

webrtc/modules/rtp_rtcp/interface/rtp_receiver.h

Index: webrtc/modules/rtp_rtcp/interface/rtp_receiver.h
diff --git a/webrtc/modules/rtp_rtcp/interface/rtp_receiver.h b/webrtc/modules/rtp_rtcp/interface/rtp_receiver.h
index 62835667df09715612bca73e39c744af7efbd35c..2fb8ac5d61728e10712e61067c9ff4eb16f01f49 100644
--- a/webrtc/modules/rtp_rtcp/interface/rtp_receiver.h
+++ b/webrtc/modules/rtp_rtcp/interface/rtp_receiver.h
@@ -37,14 +37,14 @@ class RtpReceiver {
  public:
   // Creates a video-enabled RTP receiver.
   static RtpReceiver* CreateVideoReceiver(
-      int id, Clock* clock,
+      Clock* clock,
       RtpData* incoming_payload_callback,
       RtpFeedback* incoming_messages_callback,
       RTPPayloadRegistry* rtp_payload_registry);
 
   // Creates an audio-enabled RTP receiver.
   static RtpReceiver* CreateAudioReceiver(
-      int id, Clock* clock,
+      Clock* clock,
       RtpAudioFeedback* incoming_audio_feedback,
       RtpData* incoming_payload_callback,
       RtpFeedback* incoming_messages_callback,