Don't remove the swarm cells! You'll be better off to let the bees raise their own queen and then, if you don't like her for some reason, buy a new queen, kill the old one and requeen. Many times the bees will kill a new, introduced queen even if you scrape the cells. Believe me, requeening is a fast way to lose money, $20.00 at a clip, in this business. A hive with a queen is easy to requeen; any other condition is an iffy bet!