ABC's Kingdom Hospital has claimed another victim: Susan Lyne has stepped down as the network's entertainment president. The move comes two weeks after Lloyd Braun exited his post as network chairman, four weeks after Kingdom Hospital was put on life support, six months after the arrival of It's All Relative and more than a year since Are You Hot? crashed and burned. So, who's minding the store now? Touchstone Television president Stephen McPherson, who, according to sources, never saw eye-to-eye with Lyne. "He was not an advocate of hers," one former network exec tells my colleague, Stephen Battaglio. "She was not going to work for him. They were not close."