Jennifer Salke, head of Amazon MGM Studios, is stepping down from her role to focus on producing.The company will not fill Salke's role as part of efforts to 'flatten our leadership structure'.Salke joined Amazon in 2018 and played an important role in building up Prime Video's lineup.Courtenay Valenti, head of film, and Vernon Sanders, head of TV, will now report directly to Mike Hopkins, Prime Video and Amazon MGM Studios head.