Implements hook_node_delete().
function menu_node_delete($node) {
// Delete all menu module links that point to this node.
$result = db_query("SELECT mlid FROM {menu_links} WHERE link_path = :path AND module = 'menu'", array(
':path' => 'node/' . $node->nid,
), array(
'fetch' => PDO::FETCH_ASSOC,
));
foreach ($result as $m) {
menu_link_delete($m['mlid']);
}
}