Simply send a support request ticket to ask for the game to be removed from your steam list. They'll remove it.
Then at a later date (Give it a week or 2) send another support ticket, saying that you've got a vac infraction for a game you don't own Then they'll remove the infraction, and you can re-buy the game and play without the vac ban.
This method worked for me about a month ago after i got vac'd from CS:GO, Now my profile only shows the vac ban i got for cheating in dof:s