Currently I am using $node->webform['confirmation'] in Webform to redirects the user after form processing has been completed.

The code sample is as follows

<?php
// Redirect to msn when done.
$node->webform['confirmation'] = 'http://msn.com';

// Redirect to node 2 (an internal Drupal path).
$node->webform['confirmation'] = 'internal:node/2';
?>

But unfortunately I am unable to get rid of the &sid=xxx. Is there a way to get rid of the ?sid=[submission-id] that is appended even if i use redirects?