@Web
In file:
oc-content/themes/beta/ajax.php
Remove:
(SELECT "region" as type, r.s_name as name, c.s_name as name_top, null as city_id, r.pk_i_id as region_id, r.fk_c_country_code as country_code FROM ' . DB_TABLE_PREFIX . 't_region r, ' . DB_TABLE_PREFIX . 't_country c WHERE r.fk_c_country_code = c.pk_c_code AND r.s_name like "' . $term . '%")
UNION ALL
Will hide region just in auto-complete feature.