It’s too late for a group of ex-NFL players to pursue concussion-related claims against the league’s official helmet-maker, a state appeals court ruled Monday.The 1st District Appellate Court determined 54 out of 55 players in a class-action case against BRG Sports, the parent company of Riddell, are blocked by Illinois’ two-year statute of limitations for filing injury cases.Those players were part of a 2015 settlement with the NFL in federal court stemming from similar claims: That repeated collisions …