By Matt Hladik The Dallas Cowboys had dropped plenty of hints that they wanted to trade Amari Cooper. On Saturday, they did it, sending the wide receiver to the Cleveland Browns. By getting rid of Cooper, the Cowboys cleared a substantial amount of cap space, and by trading him, they were able to recoup an asset, namely a fifth-round pick. That didn’t stop Dez Bryant, Dallas’ former No. 1 receiver, from expressing his disappointment with the move on Twitter. We don’t blame Dez for being disappointed. Cooper was a valuable piece for the Cowboys last season, and at 27 years old, should still hav…