Australian cyclist Richie Porte, third in the Tour de France two years ago, has retired. “I could never have imagined as a young kid growing up in Tasmania I’d be lucky enough to travel the world riding a bike, ride with some of the best teams in the cycling world and meet so many brilliant people along the way,” the 37-year-old Team Ineos Grenadiers rider said on Twitter on Tuesday. Porte won the Paris-Nice race three times, the Tour Down Under in his home country twice, the Tour de Romandie, the Tour de Suisse and the Critérium du Dauphiné, among others. “I’m very much ready to enjoy the nex…