CommonWealth Beacon reports the owner of the Earl of Sandwich kiosk on Boston Common has had enough of all the money it keeps losing and so is closing it down at the end of next month. The city plans to look for a new operator for the one-time men's room, with beer and wine a possibility, although that would add more than $100,000 to the initial costs, given the state Legislature has once again refused to give Boston more alcohol licenses.