Modx Error Logging - possible to turn off?

if (!defined('MODX_LOG_LEVEL_FATAL')) {
    define('MODX_LOG_LEVEL_FATAL', 0);
    define('MODX_LOG_LEVEL_ERROR', 1);
    define('MODX_LOG_LEVEL_WARN', 2);
    define('MODX_LOG_LEVEL_INFO', 3);
    define('MODX_LOG_LEVEL_DEBUG', 4);
}

<?php
/* ListDuplicateAliases snippet */

$fix = false; /* set to true to fix them */

$resources = $modx->getCollection('modResource', array('deleted'=>'0'));
$output = 'Resources with duplicate aliases<br />';
foreach($resources as $resource) {
    if ($resource->isDuplicateAlias()) {
        $output .= '<br /><br />Pagetitle: ' . $resource->get('pagetitle');
        $output .= '<br />alias: ' . $resource->get('alias');
       /* optional  -- fix it by creating autoalias and, if that doesn't work, 
            add a unique string to the end of the alias
       */

      if ($fix) {
            $oldAlias = $resource->get('alias');
            $newAlias = $resource->get('pagetitle');
              /*MODx will convert it to an auto alias based on the pagetitle here */
            $resource->set('alias', $newAlias);

            if ($resource->isDuplicateAlias()) { 
               /* still no good */
                $newAlias =  $oldAlias . '-' .  time()
                $resource->set('alias' ,  $newAlias);
            }
            $output .= '<br />Alias changed to: ' .  $newAlias;
            resource->save();
      }

    }
}