By Zach Koons The Cornhuskers gave up 49 points and nearly 600 yards of offense to the Sooners on Saturday. Another remnant of the Scott Frost era at Nebraska has been excused as interim head coach Mickey Joseph fired defensive coordinator Erik Chinander following a blowout loss to Oklahoma on Saturday, as first reported by Sean Callahan of Husker Online. Sports Illustrated’s Ross Dellenger confirmed the news on Sunday. The decision to dismiss Chinander comes after the Huskers’ defense yielded 49 points and 580 yards of total offense to the Sooners in a battle between the former Big 12 rivals….