Makefile

--- a/Makefile	Wed Nov 11 22:01:45 2020 +0100
+++ b/Makefile	Fri Nov 06 11:24:54 2020 +0100
@@ -192,13 +192,9 @@
 # Packaging targets
 
 packaging_targets := \
-  centos5 \
-  centos6 \
   centos7 \
   centos8 \
   deb \
-  docker-centos5 \
-  docker-centos6 \
   docker-centos7 \
   docker-centos8 \
   docker-debian-bullseye \