Cynthia Calvillo doesn’t plan to stick around much longer at 125 pounds. The UFC veteran returns Saturday against Nina Nunes on the preliminary card of UFC on ESPN 41. But despite the flyweight return, Calvillo (9-4-1 MMA, 6-4-1 UFC) has her mind set on returning to her original home of 115 pounds. “I think what’s going to happen is that we’re going to get through this fight first, and then we’re going to go back and re-run the tests and do a practice weight cut and just make sure that I’m going to be healthy enough to get back to…