Kevin Costner may have been dissed by one of his former “Yellowstone” co-stars.  In a recent interview, Luke Grimes said filming the final season without Costner was a relief.     Quote, “To be really honest, there was a part of Kevin being gone that meant some of the conflict was gone.     “Obviously, it didn’t make it super fun to be around.  Not pointing any fingers, but it was actually the easiest season we’ve filmed.”     Earlier this week, after the “Yellowstone” finale aired, Costner was asked by the paparazzi if he’d spoken to Luke and he said, quote, “We’re done talking.”     (Kevin was actually nice to the guy, but he obviously didn’t want to comment.  Here’s video.)