remove support for witness

entrypoint.sh

@@ -119,8 +119,6 @@ repmgr_setup_conf() {
     printf "failover        = automatic\n"
     printf "promote_command = '/usr/bin/repmgr standby promote -f /etc/repmgr/repmgr.conf --log-to-file'\n"
     printf "follow_command  = '/usr/bin/repmgr standby follow  -f /etc/repmgr/repmgr.conf --log-to-file --upstream-node-id=%n'\n"
-    printf "\n"
-    printf "primary_visibility_consensus = on\n"
   } > /etc/repmgr/repmgr.conf
 
 }