[aur-general] Deletion request: some lxpolkit packages

All the following three customized packages are dumped by the same submitters, and fail to build. https://aur.archlinux.org/packages/gnome-disk-utility-lxpolkit https://aur.archlinux.org/packages/gnome-disk-utility-lxpolkit-git https://aur.archlinux.org/packages/libsoup-gnome-lxpolkit