First, it is far more common for quick releases to work on stamped drops. The drops are just too thin, generally.

I have run into this situation time and time again. I feel no worries over removing a wee bit (enough necessary), from each end to shorten the axle. Be forewarned, though that you just might run into a second problem...

Quick release (hollow, as a rule) are slightly larger in diameter than nutted axles. That slightly larger diameter means that the axle will not fit into the front drop slots (assuming the front drops are also stamped). In such a case, I do my best to equally file flats onto the ends of the axle. I never file the drops (I am not a fan of altering bicycle frames or forks).

Hope that is a bit of help.