Goodbye Dinosaur!, Mr. Toad (Disneyland), Splash Mountain (While a classic, Song of the South does not have the popularity to justify its continued existence), Song of the Rainforest, Swiss Family Treehouse, Gadget's Go Coaster (Disneyland), most of Storybook Land (Disneyland), and Roger Rabbit's Car-Toon Spin (I love him, but he's just not popular enough anymore). Why must something be considered a classic to have an attraction based on it?
Besides, the Pocahontas show isn't a rehashing of the story anyway. She and Grandmother Willow are used to create a connection of sorts. It's easier to get into a story if you have some idea who the characters are.