[gnome-session] (4 commits) Non-fast-forward update to branch wip/benzea/systemd-user-switch

[Benjamin Berg <bberg src gnome org>]

The branch 'wip/benzea/systemd-user-switch' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  f5c9cee... main: Enable systemd usage
  2c10e32... manager: Drop DBus restart as it is handled using systemd
  7df25eb... system: Remove is_last_session API as it is unused
  1d79099... !fixup main: Enable systemd usage
  add16b5... main: Export autostart dir into environment

Commits added to the branch:

  85d9045... main: Enable systemd usage
  054340e... manager: Drop DBus restart as it is handled using systemd
  d73a06e... system: Remove is_last_session API as it is unused
  f0aca18... main: Export autostart dir into environment