Remove "setNested" from config

How can I remove a line from a config if I have set it with "setNested" before? When I try to remove it does not work

 

What have you tried?

 

$config->remove("test.2");

 

when you set the variable as nested, you basically made an array. use this to help you:

PHP:

if(isset($config->getAll()[$key])) {
    $arr = $config->getAll();
    unset($arr[$key]);
    $config->setAll($arr);
}


$key is what comes before the .
$config is an instance of Config