You don't want to have WAY too much. You might be okay but if you're worried about it you can CAREFULLY, back out the drain plug a little at a time until it drains a bit of oil out. I've done it before and if you're careful, you won't make a mess or drain out all of your oil. Depends on how confident and careful you are.
My opinion? Better not to run it overfull but you're probably not exactly in the danger zone. Also, bear in mind that if you're not using a rear stand, it can be difficult to hold the bike at perfect level. If you tip it a little too far to the right it may LOOK like it's overly full when in fact, it may not be. Have someone sit on the bike and hold it while you check the level.
--Wag--