Well if you are into fish cannibalism you can just let them sit there an let the parents eat them, if you have any larger fish... feed it to them, and you can always just raise them to adult-hood then sell them.
Sell them? Unlikely - rehoming to a local LFS sounds better Livebearers are a pain to get rid of as they're so prolific and common. Mum and Dad will probably eat most so just let nature take its course.