The producers of the stage musical Charlie and the Chocolate Factory, led by Warner Bros Theatre Ventures, have pulled a Harvey Weinstein. As Weinstein did with his stage version of Finding Neverland, they tossed most of the original UK production and come to Broadway with a fresh remake: Simplified production concept, significantly buffed-up score and American veteran Jack O’Brien replacing Sam Mendes, who not only staged the London show but was, and remains, a…