libtorrent: remove nested usage of with

  enableParallelBuilding = true;

  meta = with lib; {

  meta = {

    homepage = "https://github.com/rakshasa/libtorrent";

    description = "BitTorrent library written in C++ for *nix, with focus on high performance and good code";

    license = licenses.gpl2Plus;

    maintainers = with maintainers; [ ebzzry codyopel thiagokokada ];

    platforms = platforms.unix;

    license = lib.licenses.gpl2Plus;

    maintainers = with lib.maintainers; [ ebzzry codyopel thiagokokada ];

    platforms = lib.platforms.unix;

  };

}