remove support for witness

entrypoint.sh

@@ -170,11 +170,8 @@ if [[ ! -s "$PGDATA/PG_VERSION" ]]; then
       /usr/lib/postgresql/15/bin/repmgr -f /etc/repmgr/repmgr.conf standby register
       ;;
     witness )
-      until /usr/lib/postgresql/15/bin/repmgr -h $REPMGR_UPSTREAM -f /etc/repmgr/repmgr.conf witness register &> /dev/null
-      do
-        echo "Primary host not ready. Waiting for 5 minutes..."
-        sleep 300
-      done
+      echo "Witness Server not supported for this configuration!"
+      exit 100
       ;;
     * )
       /usr/lib/postgresql/15/bin/repmgr -f /etc/repmgr/repmgr.conf primary register