Defenseman Erik Gustafsson’s time with the Rangers is up — now the 32-year-old Swede is signing a two-year contract with Detroit: Gustafsson is coming off back-to-back 30-point seasons between the Rangers, Maple Leafs, and Capitals. At six-foot, 196 lbs., Gustafsson isn’t the biggest defenseman but has shown he has the ability to get involved on offense. This is likely the replacement…