Unreferenced variable $items in amazon_store_get_item_data() function

It appears there is an unreferenced variable $items in the amazon_store_get_item_data function:

/**
 * Request info about a single item from amazon
 *
 * @param unknown_type $asin
 * @return unknown
 */
function amazon_store_get_item_data($asin) {
  $parameters = array(
      'ResponseGroup' => 'Variations,Images,ItemAttributes,OfferFull,Large,EditorialReview',
      'ItemId' => $asin,
      'MerchantId' => "All",
  );

  $items = array();
  $results = amazon_store_http_request('ItemLookup', $parameters);
  $amazon_item = $results->Items->Item[0];
  if (!empty($amazon_item)) {
    amazon_store_cache_item($amazon_item);
  }
  return $amazon_item;
}