The Denver Center Theatre cancelled its opening show of next season – “Diner Stories” – with book, music and lyrics by Nancy Shayne. “It would have been the only musical in the new season and, more important, the only world premiere. Apparently, the author withdrew the show, and it’s unlikely she will take it to another company. Denver Center, which has eliminated its literary department, has few resources for discovering new works by new talent” for a replacement.