ALTOONA, Pa. — The man charged with murder in the killing of the CEO of UnitedHealthcare made it clear he wasn’t going to make things easy for authorities, shouting unintelligibly and writhing in the grip of sheriff’s deputies as he was led into court and then objecting to being taken to New York to face trial. The displays of resistance Tuesday weren’t expected to significantly delay legal proceedings for Luigi Nicholas Mangione, who was charged in last week’s Manhattan killing of Brian Thompson, the leader of the United States’ largest medical insurance company.