Norwegian biathlon star Johannes Thingnes Bø does not expect a similar historic medal haul as last year at the upcoming world championships in the Czech Republic. “I don’t think that I can repeat this performance,” Bø told the idnes.cz website in the run-up to the championships starting on Wednesday in Nove Mesto. Bø became the first man to medal in all seven events at last year’s worlds in Oberhof, Germany. He won five golds in the 20km, sprint, pursuit, mixed relay and single mixed relay, plus men’s relay silver and mass start bronze. The 17-time world and five-time Olympic champion said he …