Unused variables in rijksvideo.theme.inc

The next two lines of code on lines 17 and 18 of rijksvideo.theme.inc are not used and can be removed I think:

    $duration = new DateTime($download['duration']);
    $duration = $duration->format('i:s');

The $duration variable is never used and the duration output comes directly out of the $download array:

'@duration' => $download['duration'],

Is that correct? I'll attach a patch.