Jill Goldsmith Co-Business EditorIn another blow to New York City’s hope of a cultural revival, the Metropolitan Opera Wednesday canceled its entire season and said it won’t open for a year.“We regret to inform you that we have made the difficult decision to cancel the 2020–21 season, based on the advice of health officials. However, we are pleased to be able to announce the Met’s 2021–22 season, which will open Sep.