[akanevsky]

In my 3.0.7, there is such a line. Try one of there (you can add the line after any of these):

$DB_site->query("DELETE FROM " . TABLE_PREFIX . "editlog WHERE postid IN ($postids" . "0)");
$DB_site->query("DELETE FROM " . TABLE_PREFIX . "moderation WHERE postid IN ($postids" . "0)");
$DB_site->query("DELETE FROM " . TABLE_PREFIX . "reputation WHERE postid IN ($postids" . "0)");
$DB_site->query("DELETE FROM " . TABLE_PREFIX . "post_parsed WHERE postid IN ($postids" . "0)");
$DB_site->query("DELETE FROM " . TABLE_PREFIX . "post WHERE postid IN ($postids" . "0)");