[planner] Remove Maurice and Kurt from maintainers

[Alexandre Franke <afranke src gnome org>]

commit cbc020a263f10f0b263328a83b6199e2f2c2c4ae
Author: Alexandre Franke <afranke gnome org>
Date:   Thu Jun 3 12:49:01 2021 +0200

    Remove Maurice and Kurt from maintainers
    
    They have gone AWOL a while ago

 planner.doap | 14 --------------
 1 file changed, 14 deletions(-)
---
diff --git a/planner.doap b/planner.doap
index 73c5b854..f9f0cd0c 100644
--- a/planner.doap
+++ b/planner.doap
@@ -12,20 +12,6 @@
   <bug-database rdf:resource="https://gitlab.gnome.org/GNOME/planner/issues/"; />
   <!-- <category rdf:resource="http://api.gnome.org/doap-extensions#productivity"; /> -->
 
-  <maintainer>
-    <foaf:Person>
-      <foaf:name>Maurice van der Pot</foaf:name>
-      <foaf:mbox rdf:resource="mailto:griffon26 kfk4ever com" />
-      <gnome:userid>mvdpot</gnome:userid>
-    </foaf:Person>
-  </maintainer>
-  <maintainer>
-    <foaf:Person>
-      <foaf:name>Kurt Maute</foaf:name>
-      <foaf:mbox rdf:resource="mailto:kurt maute us" />
-      <gnome:userid>kmaute</gnome:userid>
-    </foaf:Person>
-  </maintainer>
   <maintainer>
     <foaf:Person>
       <foaf:name>Alexandre Franke</foaf:name>