There’s a hole in Viral Chhadua’s beer display in the back coolers of the Gainesville Exxon on Browns Bridge Road. Not one Boston-brewed Sam Adams will occupy that spot until the end of the Super Bowl, when the Atlanta Falcons face the New England Patriots. Chhadua, the store’s manager, put up a sign saying the store would not sell any Sam Adams beer until after the Super Bowl Feb. 5 in Houston.