Hal Childs, a former assistant general manager for the Knicks and public relations director for the Warriors and Mariners, has died of complications from heart disease. He was 84. Childs’ wife, Jacqueline, said Wednesday that her husband died Sunday at his home in Dublin. Hal Childs served as assistant GM of the Knicks from 1987-91 and ran the Warriors’ PR department during the organization’s first championship season in 1974-75. He also worked in PR for the Mariners, Seattle SuperSonics and San Diego Clippers.