CHICAGO — The Chicago Blackhawks filed a motion Tuesday to dismiss a negligence lawsuit brought by a former prospect who accused the team of covering up his complaints in 2010 that he was sexually assaulted and harassed by then-video coach Brad Aldrich. In the motion, the Hawks’ attorneys argue the suit should be thrown out on the grounds that it missed deadlines for filing and that its claims fail to meet the standards of what constitutes negligent or intentional “infliction of emotional distress.” In a statement to the Tribune, the NHL team said: “While we cannot comment further on active li…