gone from HBO Max, having been restored to the streaming service’s library with a new prologue about the film’s problematic themes and depictionof the antebellum South.Jacqueline Stewart, host of TCM’s “Silent Sunday Nights” and a professor in the Department of Cinema and Media Studies at the University of Chicago, leads the 4 ½-minute intro, which starts off with a general cinematic lesson — recounting the eight Academy Awards (including for Best Picture) won in 1939 by the “highly anticipated”