Removes undefined declarations in channel.h.

Bug: webrtc:9883
Change-Id: Ib49a407ee6919b879ee0073c1d9a97419c975130
Reviewed-on: https://webrtc-review.googlesource.com/c/106700
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25234}
diff --git a/pc/channel.h b/pc/channel.h
index 535f64e..c7a842e 100644
--- a/pc/channel.h
+++ b/pc/channel.h
@@ -351,9 +351,6 @@
     return static_cast<VoiceMediaChannel*>(BaseChannel::media_channel());
   }
 
-  webrtc::RtpParameters GetRtpSendParameters_w(uint32_t ssrc) const;
-  webrtc::RTCError SetRtpSendParameters_w(uint32_t ssrc,
-                                          webrtc::RtpParameters parameters);
   cricket::MediaType media_type() override { return cricket::MEDIA_TYPE_AUDIO; }
 
  private: