update_jdn: update now that all codethink nodes run bionic

Signed-off-by: Mattia Rizzolo <mattia@debian.org>

update_jdn.sh

@@ -322,14 +322,12 @@ if [ -f /etc/debian_version ] ; then
 			zsh
 			"
 		case $HOSTNAME in
-			codethink10*)
-				# munin-node from buster-backports requires init-system-helpers>=1.54
-				# which is available in bionic-backports, we only need to convince apt
-				DEBS="$DEBS init-system-helpers/bionic-backports"
-				;&
 			codethink*)
 				# the apt_preferences(5) file will cause some packages to come
 				# from Debian backports
+				# munin-node from buster-backports requires init-system-helpers>=1.54
+				# which is available in bionic-backports, we only need to convince apt
+				DEBS="$DEBS init-system-helpers/bionic-backports"
 				;;
 			*)	# not available in Ubuntu 16.04:
 				DEBS="$DEBS