The B-League champion Hiroshima Dragonflies on Monday announced the departure of head coach Kyle Milling, who guided the club to its first Japanese basketball title last month. The 49-year-old American is stepping down after three seasons at the helm of the Dragonflies. Hiroshima came back from a one-win deficit to clinch a 2-1 victory over the defending champion Ryukyu Golden Kings in the best-of-three B-League finals at Yokohama Arena. “The staff, players and I worked hard over three years to get better every year and finish this season as champions,” Milling said in a statement. “My family …