config/session-management: remove reference to removed dbus-elogind packages

Author: ahesford

src/config/session-management.md

@@ -37,10 +37,6 @@ To make use of its features, install the `elogind` package and make sure the
 If you're having any issues with elogind, [enable](./services/index.md) its
 service, as waiting for a D-Bus activation can lead to issues.
 
-There is an alternative D-Bus configuration which takes advantage of elogind for
-features such as seat detection. It requires installing the `dbus-elogind`,
-`dbus-elogind-libs` and `dbus-elogind-x11` packages.
-
 ## seatd
 
 [seatd(1)](https://man.voidlinux.org/seatd.1) is a minimal seat management