Delete a few return values from audio streams and video send streams.

Bug: webrtc:10198
Change-Id: I583dbb717aea26c9d282a3786062d285121fbf66
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/125723
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Fredrik Solenberg <solenberg@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26986}
diff --git a/audio/channel_receive.h b/audio/channel_receive.h
index b3e4f9c..a67b0db 100644
--- a/audio/channel_receive.h
+++ b/audio/channel_receive.h
@@ -84,7 +84,7 @@
   virtual absl::optional<std::pair<int, SdpAudioFormat>>
       GetReceiveCodec() const = 0;
 
-  virtual bool ReceivedRTCPPacket(const uint8_t* data, size_t length) = 0;
+  virtual void ReceivedRTCPPacket(const uint8_t* data, size_t length) = 0;
 
   virtual void SetChannelOutputVolumeScaling(float scaling) = 0;
   virtual int GetSpeechOutputLevelFullRange() const = 0;