Merge branch 'trisquel_meta_10.0' into 'master'

Trisquel meta 10.0

See merge request !23

10.0/trisquel-meta/debian/changelog

+trisquel-meta (10.0-6) nabia; urgency=medium
+
+  * Remove trisquel 9.0 specific packages
+
+ -- Trisquel GNU/Linux developers <trisquel-devel@listas.trisquel.info>  Mon, 09 Aug 2021 02:12:54 -0500
+
 trisquel-meta (10.0-5) nabia; urgency=medium
 
   * Adjust further changes for nabia/trisquel-desktop-common