Disable "Operating in maintenance mode. Go online."
Drupal 8 version:

function mytheme_preprocess_status_messages(&amp;$variables) {
  if (\Drupal::state()-&gt;get('system.maintenance_mode')) {
    $message_count = count($variables['message_list']['status']);
    if ($message_count &gt; 1) {
      array_shift($variables['message_list']['status']);
    }
    else {
      unset($variables['message_list']['status']);
    }
  }
}