Packers linebacker Quay Walker recently offered some simple advice for his new rookie teammate, Edgerrin Cooper. Don’t think. Actually, Walker’s words were “don’t do no thinking, bro. Just fly around. If you mess up, it is what it is. You are a rookie. Just take want you can learn … and go from there.” And according to Packers coaches, Cooper did a nice job during OTAs and minicamp of simply reacting. That way, he can use his speed to make plays, albeit in no-contact drills. Cooper can answer another question once the Packers begin training camp, July 22. Is he good enough to start? The Packer…