7b3ce5b872
Only use of this method was to implement the cross-device case of MoveFile on unix systems. In turn, only use of the MoveFile method is in FileRotatingStream::RotateFiles. Since file rotation should never involve any copying of log data, the MoveFile fallback to copying can be deleted. BUG=webrtc:6424 Review-Url: https://codereview.webrtc.org/2747373003 Cr-Commit-Position: refs/heads/master@{#17364}