LAUSANNE, Switzerland—In the first formal disqualification of a Tokyo Olympics athlete for doping, Russian Igor Polyanskiy has been banned for three years, World Triathlon said on over the weekend. Polyanskiy admitted doping with EPO, an endurance boosting hormone, ahead of the Olympics and is banned until during the 2024 Paris Games. World Triathlon added Polyanskiy did not dispute his positive test in a sample taken at a training camp in Vladivostock, Russia, five days before he began competing in Tokyo. The positive test was notified after he placed 43rd in the men’s race and helped the Rus…