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/audio_receive_stream.h b/audio/audio_receive_stream.h
index 1745c0f..0924c03 100644
--- a/audio/audio_receive_stream.h
+++ b/audio/audio_receive_stream.h
@@ -91,7 +91,7 @@
 
   void AssociateSendStream(AudioSendStream* send_stream);
   void SignalNetworkState(NetworkState state);
-  bool DeliverRtcp(const uint8_t* packet, size_t length);
+  void DeliverRtcp(const uint8_t* packet, size_t length);
   const webrtc::AudioReceiveStream::Config& config() const;
   const AudioSendStream* GetAssociatedSendStreamForTesting() const;