Uncss для Bootstrap?

.pipe(uncss({
        html: ["dev/index.html", "prod/index.html"],
        ignore: [/\w\.in/,
                ".fade",
                ".collapse",
                ".collapsing",
                /(#|\.)navbar(\-[a-zA-Z]+)?/,
                /(#|\.)dropdown(\-[a-zA-Z]+)?/,
                /(#|\.)(open)/,
                ".modal",
                ".modal.fade.in",
                ".modal-dialog",
                ".modal-document",
                ".modal-scrollbar-measure",
                ".modal-backdrop.fade",
                ".modal-backdrop.in",
                ".modal.fade.modal-dialog",
                ".modal.in.modal-dialog",
                ".modal-open",
                ".in",
                ".modal-backdrop"]
    }))