The criticism of Luka Doncic’s weight at the start of the NBA season was duly noted, and the preseason MVP favorite has been “unstoppable” since hearing the noise, according to Dallas Mavericks owner Mark Cuban. For the second straight season, the Mavs superstar was accused of showing up for camp out of shape. Doncic admits that he “maybe” relaxed “too much” after leading Slovenia on a deep run at the Tokyo Olympics. But the 22-year-old vowed to “trim down” and “do better”—and has done exactly that, as he’s reportedly at a weight similar to his rookie year. The Mavs were 17-18 at the end of De…