UsersTable::onUserDelete

static function onUserDelete($userId)
{
	$userFaces = static::getList(array('filter' => array('=USER_ID' => $userId)))->fetchAll();
	if (!empty($userFaces))
	{
		foreach ($userFaces as $userFace)
		{
			// delete user's face
			static::deleteUserFace($userFace);
		}
	}
}