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

[Andre Klapper <aklapper src gnome org>]

commit ec9474d365a59be3b6db6a4ebb8bf061dde67674
Author: Andre Klapper <a9016009 gmx de>
Date:   Sun Dec 16 01:26:05 2018 +0100

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

 libgfbgraph.doap | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/libgfbgraph.doap b/libgfbgraph.doap
index 933179d..7d8beb3 100644
--- a/libgfbgraph.doap
+++ b/libgfbgraph.doap
@@ -10,7 +10,7 @@
   <download-page rdf:resource="http://download.gnome.org/sources/libgfbgraph"; />
   <bug-database rdf:resource="https://bugzilla.gnome.org/enter_bug.cgi?product=libgfbgraph"; />
 
-  <category rdf:resource="http://api.gnome.org/doap-extensions#desktop"; />
+  <!-- <category rdf:resource="http://api.gnome.org/doap-extensions#desktop"; /> -->
 
   <maintainer>
     <foaf:Person>