It depends on what you're doing in your vehicle. I would either remove it - or use it to hang something else in its place. Even if the replacement was just a simple cheap steel wheel with a plate welded to the bottom for some protection of the other stuff under there. You can often find single spare Toyota Aluminum wheels for $50 or less and I'd just use one as a skid plate. It's cheap, light weight, and offers some protection down there.