k8s-certs-renew: fix broken script (#12876)

Unproquer quoting of variable assignment make the shell interpret it as
a command ; since the variable is unused anyway, just delete it.

roles/kubernetes/control-plane/templates/k8s-certs-renew.sh.j2

@@ -5,7 +5,6 @@ echo "## Check Expiration before renewal ##"
 {{ bin_dir }}/kubeadm certs check-expiration
 
 days_buffer=7 # set a time margin, because we should not renew at the last moment
-calendar={{ auto_renew_certificates_systemd_calendar }}
 next_time=$(systemctl show k8s-certs-renew.timer  -p NextElapseUSecRealtime --value)
 
 if [ "${next_time}" == "" ]; then