Cutting Robinson puts more focus on Grimes

Last year, the Falcons entered the season with a top-notch depth chart of cornerbacks:  Brent Grimes, Dunta Robinson, and Asante Samuel. This year, two thirds of that trio could be gone. With Robinson cut, only Samuel remains under contract.  Grimes signed a one-year franchise tender in 2012, which paid him $10.284 million last season.  He…