Like I said, you’re never sending the request… same as with your other recent topic.
So:
if (isset($_POST['act']))
{
foreach ($_POST['act'] as $act => $itemID)
{
if (in_array($act, array('remove')))
{
$remove=new RouterOs\Request("/ppp/active/{$act}");
$remove->setArgument('numbers', $itemID);
$client->sendSync($remove);
}
}
}