[sysadmin-bin] Drop useless decode

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit ddbec09664c4a13ac0a73df15731d2bb76ab2182
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Thu Jul 30 14:34:13 2020 +0200

    Drop useless decode

 git/gnome-post-receive-email | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/git/gnome-post-receive-email b/git/gnome-post-receive-email
index cc31447..2fc90f4 100755
--- a/git/gnome-post-receive-email
+++ b/git/gnome-post-receive-email
@@ -134,7 +134,7 @@ class RefChange(object):
 
     def generate_header(self, out, subject, include_revs=True, oldrev=None, newrev=None, cc=None):
         if user_fullname:
-            from_address = "%s <%s src gnome org>" % (Header(user_fullname.decode("utf-8")), user_entry)
+            from_address = "%s <%s src gnome org>" % (Header(user_fullname), user_entry)
         else:
             if socket.gethostname() == 'gitlab.gnome.org':
                 from_address = "%s <%s>" % (Header(gitlab_name), gitlab_email)