[planner] Comment invalid <category> in DOAP file to pass git pre-receive hook

[Andre Klapper <aklapper src gnome org>]

commit fa7cbe309d5a705502ca46f808bcf78840804dbe
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Dec 16 20:54:44 2018 +0100

    Comment invalid <category> in DOAP file to pass git pre-receive hook

 planner.doap | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/planner.doap b/planner.doap
index 84ecdbb..73c5b85 100644
--- a/planner.doap
+++ b/planner.doap
@@ -10,7 +10,7 @@
   <mailing-list rdf:resource="http://mail.gnome.org/mailman/listinfo/planner-dev-list"; />
   <download-page rdf:resource="http://download.gnome.org/sources/planner/"; />
   <bug-database rdf:resource="https://gitlab.gnome.org/GNOME/planner/issues/"; />
-  <category rdf:resource="http://api.gnome.org/doap-extensions#productivity"; />
+  <!-- <category rdf:resource="http://api.gnome.org/doap-extensions#productivity"; /> -->
 
   <maintainer>
     <foaf:Person>