Removing fields from submission form

I tried to follow your instructions I am unable to remove social media fields like xing. I tested with other fields like (Event Title and Event Type) and worked perfectly.

but for some reason won’t work for social media fields, tired to change [‘xing’] to [‘organizer_xing’] still not working, this is the code I am using now.

function frontend_remove_fields ($fields) {
	unset($fields['event']['event_title']);
	unset($fields['event']['event_type']);
	unset($fields['event']['organizer_xing']);
    return $fields;
}
add_filter('submit_event_form_fields', 'frontend_remove_fields');

http://www.wp-eventmanager.com/documentation/removing-a-existing-field-from-event-submission-form/ but didn’t work