No Newsletter Archive

Hi Guys,

A few of my clients do not use the newsletter archive function - they don't want a list of previous emails being available.  However, I've now noticed that if th email is received in plain text, they get a message to view the archive.  I think this is from newsletter.php

function nlb_sendMessage_textContent($newsletterSettings) {
  static $text;
  if (!isset($text)) { // load (and cache) text
    $text = t("To view this message, please use an HTML compatible email viewer");
    // we can't use this here as it doesn't make sense for newsletter confirmation messages
    if ($newsletterSettings['archive_url']) {
      $text .= sprintf( t("\nor click here to view the newsletter archive:\n %s"), $newsletterSettings['archive_url']);
    }
  }
  return $text;

Can I can comment this out and not cause any flow on issues?