stop trying to backup the not running postgres data on db-qa-stg91

inventory/host_vars/db-qa-stg01.qa.fedoraproject.org

@@ -45,13 +45,13 @@ tcp_ports: [ 5432, 443 ]
 ############################################################
 
 # This is a generic list, monitored by collectd
-databases:
-- postgres
-- resultsdb
+#databases:
+#- postgres
+#- resultsdb
 
 # This is a more strict list, to be made publicly available
-dbs_to_backup:
-- postgres
+#dbs_to_backup:
+#- postgres
 #- buildmaster
 #- buildmaster_dev
 #- buildmaster_stg