You're thinking of dropping a class that you're currently in, which you no longer need? You would get a W if you're currently enrolled most likely. If you're really set on dropping it, I would call the optometry school you're going to next year and ask them if it would have any impact on your acceptance. I decided not to take a course next semester that I had originally told my optometry school I would be taking (no longer needed it for the school I got into). I just called them and asked if it was an issue and they told me no.