Two brutes — including one who was busted for a separate assault last month — beat a longtime Bronx fruit vendor and father of three to death with a baseball bat in a “cold-hearted,” unprovoked attack earlier this month, cops and sources said. Romel Jarrett, 37, and Terrence Downes, 44, wrestled 56-year-old Leslie Sanchez to the ground and bashed him in the head with the bat at his selling spot on East Fordham Road near the Grand Concourse in Morris Heights around 7:40 p.m. Sept. 12, according to authorities and a criminal complaint. He was taken to St. Barnabas Hospital...