[gnome-panel] Remove defunct ancient Bugzilla workflow from HACKING

[Andre Klapper <aklapper src gnome org>]

commit 7e2d055b2b446cb1148c6c0aa96465a4c31dcda1
Author: Andre Klapper <a9016009 gmx de>
Date:   Wed Jan 22 00:23:49 2020 +0100

    Remove defunct ancient Bugzilla workflow from HACKING

 HACKING | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/HACKING b/HACKING
index 09bc6eea2..31c0a78bc 100644
--- a/HACKING
+++ b/HACKING
@@ -3,20 +3,15 @@ Hacking on gnome-panel
 
  + The development occurs in git:
 
-     http://git.gnome.org/browse/gnome-panel
+     https://gitlab.gnome.org/GNOME/gnome-panel
 
    For information on how to access GNOME git please read:
 
-     http://live.gnome.org/Git
+     https://wiki.gnome.org/Git
 
- + Please send patches as bug reports in GNOME Bugzilla:
+ + Please send patches as merge requests in GNOME Gitlab:
 
-     https://bugzilla.gnome.org/ (product gnome-panel)
-
-   Your patch should be in unified diff form (the -u option to GNU
-   diff). See also:
-
-     http://live.gnome.org/GnomeLove/SubmittingPatches
+     https://wiki.gnome.org/GitLab
 
  + Please try and send a patch against a recent version of this package.
    Patches against git master are most preferable.