Remove temporary using webrtc::OnCompleteFrameCallback statement.

Bug: webrtc:12579
Change-Id: I9ba7735be20318b1f37bc7e75b07804ef694a7b4
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/220362
Reviewed-by: Erik Språng <sprang@webrtc.org>
Commit-Queue: Philip Eliasson <philipel@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34162}
diff --git a/video/rtp_video_stream_receiver.h b/video/rtp_video_stream_receiver.h
index b2abe42..b3d62f3 100644
--- a/video/rtp_video_stream_receiver.h
+++ b/video/rtp_video_stream_receiver.h
@@ -425,9 +425,6 @@
       RTC_GUARDED_BY(packet_buffer_lock_);
 };
 
-// TODO(philipel): Remove when downstream has been updated.
-using OnCompleteFrameCallback = RtpVideoStreamReceiver::OnCompleteFrameCallback;
-
 }  // namespace webrtc
 
 #endif  // VIDEO_RTP_VIDEO_STREAM_RECEIVER_H_