If you’re not a fan of the Mountain West Conference, this item is a bit like the old riddle about the tree falling in an empty forest. Except instead of a tree, it’s a cable network. The Colorado Springs Gazette reports The Mtn., the regional all-sports network that was home to six of Air Force’s 13 football games last year as well as scores of contests in other sports, will go off the air for good May 31. When it came to the forest of pay TV, the network barely made a sound outside its home region, leaving the naturally…