[gnome-initial-setup/wip/benzea/systemd-user: 19/22] Update HACKING file to not mention the trigger

[Will Thompson <wjt src gnome org>]

commit 74ba191c5625114a8565920cf4dcb60e04584968
Author: Benjamin Berg <bberg redhat com>
Date:   Tue Apr 16 19:28:14 2019 +0200

    Update HACKING file to not mention the trigger
    
    We have not used a trigger file to start the initial-setup for a long
    time now. Remove the left-over documentation from the HACKING file.

 HACKING | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)
---
diff --git a/HACKING b/HACKING
index eb752e1..ea78123 100644
--- a/HACKING
+++ b/HACKING
@@ -42,10 +42,9 @@ To enable the initial-setup functionality in gdm, set
 
 InitialSetupEnable=True
 
-in the [daemon] section of /etc/gdm/custom.conf. To actually
-trigger the initial-setup, gdm additionally looks for the file
-/var/lib/gdm/run-initial-setup. gdm removes this file after
-the initial setup has been performed.
+in the [daemon] section of /etc/gdm/custom.conf. GDM will trigger
+the initial-setup if there are no users configured yet and some other
+conditions also hold.
 
 The session that gdm starts for the initial-setup session is
 defined by the file /usr/share/gnome-session/sessions/gdm-setup.session.