A defamation lawsuit from former Nickelodeon producer Dan Schneider against Warner Bros. Discovery over his portrayal in Quiet on Set: The Dark Side of Kids TV has been dismissed. California’s Second District Court of Appeal on Thursday reversed a decision allowing Schneider to proceed with his lawsuit, rejecting arguments that the docuseries implied that the producer sexually abused children who worked on the Nickelodeon series he created and ran. “The documentary clearly distinguishes between the lamentable conduct that its participants attribute to Schneider — gender discrimination, harassment, toxic workplace behavior, and…