In Aaron Sorkin's revised script for Lincoln Center Theater's new Broadway production of "Camelot," the magic is missing " in more ways than one. The declared aim of the stage, TV and film writer ("To Kill a Mockingbird," "The West Wing," "The Social Network") was to eliminate the fantastical elements in the 1960 musical and prune its cumbersome book, based on T.H. White's books of King Arthur and the tales of the kn…