Remvoe unavailable service from config

Author: kuzmany

Config/config.php

@@ -90,7 +90,6 @@
                     'mautic.lead.model.field',
                     'mautic.plugin.model.integration_entity',
                     'mautic.lead.model.dnc',
-                    'mautic.crontester.helper',
                 ],
             ],
         ],