Forget Childress. forget Perryton. Forget Pottsboro, forget Van Alstyne. Canadian and Gunter, though 338 miles apart, make up one of the most unique rivalries in Texas high school football. When the two teams kickoff in the Class 3A Division II state semifinals at 4 pm, Friday, at Anthony Field, Wildcats Stadium in Abilene, it will mark the fifthstraight semifinal meeting between two of the top…