On Friday, OpenAI, the artificial intelligence giant, had another big leadership shakeup when three important executives announced their departures. This news comes at a time when the company is aggressively narrowing its focus to core business products while preparing for a potential IPO. A Friday of leadership departures for OpenAI The most high-profile exit came from Kevin Weil, the former Instagram executive. He was serving as the Vice President of OpenAI for Science. Weil, who initially joined as Chief Product Officer, was the architect behind “OpenAI for Science,” an initiative designed to build AI-powered platforms for scientific discovery. According to…