Vineet Nayyar, the former vice-chairman of Tech Mahindra, has passed away at 85. The former World Bank executive joined Tech Mahindra, formerly known as Mahindra British Telecom, in January 2005 as its vice chair, chief executive officer and managing director. The same company, now rebranded as Tech Mahindra as of the financial year ended March 2007, saw its revenue more …