The source project of this merge request has been removed.
Drop GDM compatibility code otherwise the session locale might be set to an invalid value.
$GDM_LANG doesn't always contain a full valid locale. It might contain a "short" one (e.g. "fr") that is expanded (e.g. to "fr_fr.UTF-8) by an Xsession script shipped by gdm. So drop the compatibility code from xfce4-session, otherwise the session locale might be set to an invalid value.
Closes bug: #15414