Celtic have been sanctioned by UEFA for the fans’ use of pyrotechnics in the Champions League fixture with Borussia Dortmund this month. The Hoops fans travelled to Germany buoyed by Celtic’s opening day win over Slovan Bratislava in the hope of getting a positive away Champions League result. However, Celtic suffered a heavy defeat to Dortmund despite having the backing of a large travelling support. The attending Celtic fans certainly made themselves seen and heard, aided by the use of pyro, but yesterday, UEFA hammered the club for the fans’ use of fireworks The ruling released by UEFA stat…