Werder Bremen have suspended midfielder Naby Keita for the rest of the season because he left the squad after learning he wouldn’t be a starter in Sunday’s match at Bayer Leverkusen. Bremen said on Tuesday that Keita did not make the trip to Leverkusen and went home instead. Bremen lost 5-0 in Leverkusen, which assured the hosts of a first-ever league title. Keita, 28, will not train with the team and is also barred from the dressing room, according to a club statement, which said that a “substantial” fine was also imposed on him. “Naby’s behaviour is intolerable for us as a club. With this ac…