Remove drupal_add_js() from DisqusController.php

closeWindow() function returns a render array with the inline JS attached.
Issue on Disqus issue-queue on drupal.org: https://www.drupal.org/node/2289313
This needs to go few levels up. Something like this:

{code}
$build = array(
  '#markup' => ....
  '#attached' => ...
);
{code}