There isn’t long left before the January transfer window slams shut, with Celtic hoping to conclude some much-needed last-minute deals. Whilst the fans crave for that all-important striker, for those players to come in, you would expect the books will be balanced and players will also be moved out. Well, it seems as though David Turnbull, who is a fringe player under Brendan Rodgers, could be heading for the Celtic exit door. John Hartson certainly thinks he is on his way out and he highlighted how his game time will remain ‘limited’ if he stays at Parkhead beyond the January transfer window, …