diff -up octave-4.2.1/etc/icons/octave.appdata.xml.in.appdata octave-4.2.1/etc/icons/octave.appdata.xml.in
--- octave-4.2.1/etc/icons/octave.appdata.xml.in.appdata	2017-02-24 20:46:50.581334701 -0700
+++ octave-4.2.1/etc/icons/octave.appdata.xml.in	2017-02-24 20:47:29.866515768 -0700
@@ -58,5 +58,4 @@
 
   <url type="homepage">http://www.octave.org</url>
   <update_contact>maintainers@octave.org</update_contact>
-  <project_group>GNU</project_group>
 </component>