[seahorse] doap: Update maintainer list

[Niels De Graef <nielsdg src gnome org>]

commit 5553d8563f460239c9ba7296ae748ebfe66b5552
Author: Niels De Graef <nielsdegraef gmail com>
Date:   Tue Oct 15 00:59:04 2019 +0200

    doap: Update maintainer list
    
    Stef Walter is no longer an active maintainer here.
    
    For reference, see also
    https://mail.gnome.org/archives/desktop-devel-list/2019-October/msg00011.html

 seahorse.doap | 7 -------
 1 file changed, 7 deletions(-)
---
diff --git a/seahorse.doap b/seahorse.doap
index ab6d4c29..db0570d5 100644
--- a/seahorse.doap
+++ b/seahorse.doap
@@ -37,12 +37,5 @@ perform operations from their regular applications, like nautilus or gedit.</des
                        <gnome:userid>dueno</gnome:userid>
                </foaf:Person>
        </maintainer>
-       <maintainer>
-               <foaf:Person>
-                       <foaf:name>Stef Walter</foaf:name>
-                       <foaf:mbox rdf:resource="mailto:stef memberwebs com" />
-                       <gnome:userid>stefw</gnome:userid>
-               </foaf:Person>
-       </maintainer>
 </Project>