By Chris Rosvoglou Ben Simmons’ time with the Philadelphia 76ers officially came to an end in February, but the two sides are still dealing with the aftermath of their fractured relationship. According to ESPN insider Adrian Wojnarowski, Simmons has filed a grievance to challenge the nearly $20 million of salary the 76ers withheld from him this season. This grievance from Simmons will now go to an arbitration process. It was shared with the 76ers, the NBA and National Basketball Players Association this week. Unsurprisingly, the NBPA is supporting Simmons’ attempt to reclaim his salary for the…