One of the higher profile relationships between a caddie and a PGA Tour golfer has officially ended. In a stunning move, former Alabama star Justin Thomas announced on both his Instagram and Twitter pages on Wednesday that he’s splitting up with his caddie, Jim ‘Bones’ Mackay. It’s a surprising move to make, especially just one week ahead of The Master’s. According to Todd Lewis of The Golf Channel, Matt Minister will be caddying for him at Augusta National. Minister was recently on the bag for Patrick Cantlay. Here’s Thomas’ announcement he posted to social media below. “While incredibly diff…