Sumner Redstone will not have to face a deposition next week from his former companion Manuela Herzer's lawyers, a L.A. Superior Court judge ruled today. However, as settlement talks remain in limbo, the May-scheduled trial over the media mogul's health care is still on the calendar, a measured Judge David Cowan said Thursday. Redstone still could testify at that trial, “but he’s not going to appear to provide testimony,” noted Redstone’s attorney Robert Klieger at the…