What is and how to get rid of or hide it.
I don't have a traces.log on my system, perhaps if you past a couple of lines it would give us a clue on what program is using it.
I see it now, it is not in /var/log, or /Library/Logs but in the root on the HD.
It is empty, so I would delete. I did mine just now.
It moves to trash but then tells me it is use.
But I can't find anything using it.
I got the same thing. I just deleted the trash in terminal.
$ sudo unload -w /System/Library/LaunchDaemons/com.apple.stackshot.plist
Then you can safely remove the file and it shouldn't show up again.