Remove GetCurrentVideoTrackFormat dead code.

content/public/renderer/media_stream_utils.cc

Index: content/public/renderer/media_stream_utils.cc
diff --git a/content/public/renderer/media_stream_utils.cc b/content/public/renderer/media_stream_utils.cc
index 6bfcb5ebd729dd41160475edbf8ec2985b6ef22e..114728646c4be8a38c5ac32fa20d1bac19924bcd 100644
--- a/content/public/renderer/media_stream_utils.cc
+++ b/content/public/renderer/media_stream_utils.cc
@@ -95,19 +95,6 @@ bool AddAudioTrackToMediaStream(
   return true;
 }
 
-const media::VideoCaptureFormat* GetCurrentVideoTrackFormat(
-    const blink::WebMediaStreamTrack& video_track) {
-  if (video_track.isNull())
-    return nullptr;
-
-  MediaStreamVideoSource* const source =
-      MediaStreamVideoSource::GetVideoSource(video_track.source());
-  if (!source)
-    return nullptr;
-
-  return source->GetCurrentFormat();
-}
-
 void RequestRefreshFrameFromVideoTrack(
     const blink::WebMediaStreamTrack& video_track) {
   if (video_track.isNull())