These metrics were never hooked up to anything. Bug: webrtc:7028 Change-Id: Id6fdf146de615839820f7ad3805eb42450c76c21 Reviewed-on: https://webrtc-review.googlesource.com/c/120303 Commit-Queue: Qingsi Wang <qingsi@webrtc.org> Reviewed-by: Björn Terelius <terelius@webrtc.org> Reviewed-by: Qingsi Wang <qingsi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26451}