I need to have inguinal hernia surgery, I am 5-7, 225 lb. Would it be advisable to have some belly fat removed during the surgey?

No. The best way to lose weight is to eat less and exercise more. Further, even for open inguinal hernia repair, the incision size is small compared to that of a panniculectomy. It depends of course how important the two issues are for you as an individual.
Hernia. I would advocate having one procedure done at a time as these are completely separate issues.