Configure your rector.php:

<?php

use Rector\Config\RectorConfig;
use Rector\Removing\Rector\FuncCall\RemoveFuncCallArgRector;
use Rector\Removing\ValueObject\RemoveFuncCallArg;

return RectorConfig::configure()
    ->withConfiguredRule(RemoveFuncCallArgRector::class, [
        new RemoveFuncCallArg('remove_last_arg', 1),
    ]);