OG Anunoby, Precious Achiuwa and Malachi Flynn did not walk through the Gainbridge Fieldhouse doors. Those were the three players the Knicks acquired Saturday in the RJ Barrett-Immanuel Quickley trade to the Toronto Raptors, which left New York shorthanded to the umpteenth degree against the Indiana Pacers. The Knicks were already short Mitchell Robinson (ankle surgery) and Quentin Grimes (non-COVID related illness) on Saturday, and Jericho Sims was cleared to return to action after an ankle injury of his own, but he did not play against the Pacers. The Knicks were also on fatigued legs in the…