By Mollie Quirk Beverly Hills 90210 producer, E. Duke Vincent, has sadly died at the age of 91. The television producer’s death was confirmed by his wife Pamela Hensley Vincent, whom he was married to for more than 40 years. His death came to light in an obituary she wrote in the Santa Barbara Independent. “With profound sorrow I inform you of the passing of my beloved and brilliant husband, E. Duke Vincent, a legendary Blue Angel, an Emmy award-winning television producer and writer, and an accomplished novelist,” the obituary began. Pamela, the producer’s wife, continued to write: “Duke was …