public function clearWhitelist($ips = []) {
		$files = glob(TMP . 'maintenanceOverride-*.txt');
		foreach ($files as $file) {
			$ip = pathinfo($file, PATHINFO_FILENAME);
			$ip = substr($ip, strpos($ip, '-') + 1);
			if (!$ips || in_array($this->_unslugIp($ip), $ips)) {
				if (!unlink($file)) {
					return false;
				}
			}
		}
		return true;
	}