NEW YORK — CNN fired anchor Chris Cuomo on Saturday less than a week after new information emerged about how he assisted his brother, former New York Gov. Andrew Cuomo, as the politician faced sexual harassment allegations earlier this year. The network had suspended its prime-time host on Tuesday to investigate his conduct, after New York’s attorney general released details showing he was more involved than previously known in helping to strategize and reach out to other journalists as his brother fought to keep his job. CNN hired a law firm for that review, which it would not identify.