Unset something in config

If I had a config containing an array, how could I remove just one value from the array?

PHP:

$array = $config->get("array");
unset($array[array_search("value", $array)]);
$config->set("array", $array);
$config->save();


You may need to adapt the saving/reading techniques with an array encoding method (ex. json_encode() & json_decode()).