Maybe you could do it risk-free, but you shouldn't. For one thing, the uncleared WR carries over from month to month, whether you bust out or withdraw before clearing. More importantly, this is a monthly bonus. You can get it several times before you get banned, if you don't blatantly abuse it. If you do blatantly abuse it by withdrawing your original deposit before you've cleared the WR, guess what? You'll get banned immediately.

So sack it up and accept some +EV risk.