CHAMPAIGN — Illinois fired Athletic Director Mike Thomas today as it released the final report from its investigation into mistreatment of football and women’s basketball players.The report found no wrongdoing by Thomas, according to interim Chancellor Barbara Wilson. She praised Thomas for dealing with the string of allegations that have erupted since May. But she said a change was needed.“Decisions such as these are always difficult, but we have to focus on the best interests of our student-athletes. I …