I'd rather not completely remove it. In theory we could do things like colorizing log message or something fun like that, but in general it seems like "this might be useful" for a future evolvement of a logging library, even if we're just not using it right now.

My main worry would be that this is a perfectly reasonable function to call directly (via some call chain with `format_args!` at the top), and it seems appropriate to take a level, and just unfortunate that we don't do anything with it just yet.