Future wasn’t feeling it. Jay-Z’s single “Kill Jay-Z” ruffled a few feathers when it premiered as the intro for 4:44. The obvious Kanye West jab caught most of the nation’s attention, but Jay’s shot at Future also raised eyebrows. “Never go Eric Benét,” raps Jay. “I don’t even know what you woulda done/ In the future other niggas playin’ football with your son.” The line is an …