DETROIT — Rocket Mortgage has terminated its business relationship with top golfer Bryson DeChambeau, effectively immediately, over the 2020 U.S. Open winner’s decision to depart the PGA Tour for the new and controversial LIV tour. Rocket Mortgage made the announcement Thursday afternoon, a day after DeChambeau’s defection to the Saudi Arabia-funded tour. DeChambeau had been a Rocket Mortgage pitchman since April 2021. He won the Rocket Mortgage Classic in 2020. “Rocket Mortgage has been a long-time supporter of the PGA Tour, both through our role as an official partner and as a tournament hos…