Veteran Bollywood choreographer, Saroj Khan has died at the age of 71.   She died from a cardiac arrest at Guru Nanak Hospital in Mumbai on Friday, July 3, Narendra Sharma, one of her doctors, told CNN.    Khan had been suffering from diabetes and was undergoing dialysis, Sharma said, adding that she was battling an infection, which eventually led to cardiac arrest.   Khan had twice been tested for Covid-19 but both tests were negative, Sharma added.   Her last …