Auctions begin next week for the remains of RadioShack Corp., which is trying to figure out what to do with all its leases after last month’s Chapter 11 bankruptcy filing. The Cabin John and Rockville Pike stores both closed their doors in the last few weeks, while the Westfield Montgomery Mall store is still in business. GameStop Corp. is looking to take over some of the closed locations for its Spring Mobile subsidiary, and there’s been talk that Amazon might also be interested. All stores are expected to be either closed or sold by the end of this month.