DarkShadow44 [1] filed a deletion request for lib32-smbclient [2]:

This is not needed anymore, the last packages that had this as
dependency (lib32-gnome-vfs) was deleted a while ago.

[1] https://aur.archlinux.org/account/DarkShadow44/
[2] https://aur.archlinux.org/pkgbase/lib32-smbclient/