Remove dead code in IncomingVideoStream that's just causing contention.

webrtc/common_video/include/incoming_video_stream.h

Index: webrtc/common_video/include/incoming_video_stream.h
diff --git a/webrtc/common_video/include/incoming_video_stream.h b/webrtc/common_video/include/incoming_video_stream.h
index 40f35fe005d431b2cfc64423cb3f870d0de7f9a5..f96a23dbeabaff21de247594d11f0fa77ae00800 100644
--- a/webrtc/common_video/include/incoming_video_stream.h
+++ b/webrtc/common_video/include/incoming_video_stream.h
@@ -38,12 +38,6 @@ class IncomingVideoStream : public rtc::VideoSinkInterface<VideoFrame> {
   int32_t Start();
   int32_t Stop();
 
-  // Clear all buffers.
-  int32_t Reset();
-
-  // Properties.
-  uint32_t IncomingRate() const;
-
   int32_t SetExpectedRenderDelay(int32_t delay_ms);
 
  protected:
@@ -73,10 +67,6 @@ class IncomingVideoStream : public rtc::VideoSinkInterface<VideoFrame> {
       GUARDED_BY(thread_critsect_);
   const std::unique_ptr<VideoRenderFrames> render_buffers_
       GUARDED_BY(buffer_critsect_);
-
-  uint32_t incoming_rate_ GUARDED_BY(stream_critsect_);
-  int64_t last_rate_calculation_time_ms_ GUARDED_BY(stream_critsect_);
-  uint16_t num_frames_since_last_calculation_ GUARDED_BY(stream_critsect_);
 };
 
 }  // namespace webrtc