Nigel Lythgoe has quit ‘So You Think You Can Dance’ after being accused of sexual assault. The 74-year-old programme creator has confirmed he won’t appear on the judging panel of the upcoming series of the talent show after former ‘American Idol’ judge took legal action last month, suing her former boss for sexual assault/battery, sexual harassment, gender violence and negligence, days before a second lawsuit emerged that featured two women making similar allegations. Nigel said in a statement: “I have informed the producers of ‘So You Think You Can Dance’ of my decision to step back from part…