Mondelez International Inc., the maker of Oreo cookies and Cadbury chocolates, said it was no longer pursuing the acquisition of Hershey Co., two months after the U.S. chocolate company turned down its $23 billion cash-and-stock bid. The abandoned deal underscores the grip that a charitable trust has on the maker of Hershey's Kisses and Reese's Peanut Butter Cups.