By Amanda Brodhagen, Farms.comMcDonald’s, the world’s largest burger chain, says it will stop using Heinz ketchup because the company’s new boss is the former CEO of Burger King.Bernardo Hees, who led Burger King for three years, was recently appointed the new CEO of Heinz earlier this year. McDonald’s said in a statement that due to “recent management changes,” the company will transition over to a new ketchup supplier.The move will likely benefit Heinz’s rival ketchup maker, Hunt’s which is owned by ConAgra Foods Inc. In June, Warren Buffett’s Berkshire Hathaway hedge fund bought Heinz, and named Hees as the CEO.