removed vmailUser object class from defaults

uffd/default_config.cfg

@@ -3,7 +3,7 @@ LDAP_BASE_GROUPS="ou=groups,dc=example,dc=com"
 LDAP_SERVICE_BIND_DN=""
 LDAP_SERVICE_BIND_PASSWORD=""
 LDAP_SERVICE_URL="ldapi:///"
-LDAP_USER_OBJECTCLASSES=["vmailUser", "top", "inetOrgPerson", "organizationalPerson", "person", "posixAccount"]
+LDAP_USER_OBJECTCLASSES=["top", "inetOrgPerson", "organizationalPerson", "person", "posixAccount"]
 LDAP_USER_GID=20001
 LDAP_USER_MIN_UID=10000
 LDAP_USER_MAX_UID=18999