The exodus from “60 Minutes” continued this week as veteran producer Henry Schuster announced he is leaving CBS News after nearly two decades, becoming the latest prominent figure to depart the news magazine under Editor-in-Chief Bari Weiss. Unlike many of the recent exits that have rocked “60 Minutes,” however, Schuster’s departure was not tied to the sweeping overhaul of the program. He informed then-executive producer Tanya Simon in February that he was ready to move on — months before the