remove deprecated phantomjs package - phantomjs-prebuilt is installed
remove deprecated phantomjs package - phantomjs-prebuilt is installed

fixes #345

teaualune/react-slick,akiran/react-slick,harklee/dotsaway-react-slick,asmpx/react-slick-asmpx,BenjaminNeilDavis/react-slick,sanbornmedia/react-slick