Remove cost column from the order table

I am just trying to remove the "cost" column from the oder view page at for example www.mysite.com/admin/store/orders/[order-number].

The table function responsible for outputting the cost column is:

/**
 * Builds the order view products table.
 */
function uc_op_products_view_table($order) {
  $table = array(
    '#type' => 'tapir_table',
    '#attributes' => array('class' => array('order-pane-table')),
  );

  $table['#columns']['qty'] = array(
    'cell' => array(
      'data' => theme('uc_qty_label'),
      'class' => array('qty'),
    ),
    'weight' => 0,
  );
  $table['#columns']['product'] = array(
    'cell' => array(
      'data' => t('Product'),
      'class' => array('product'),
    ),
    'weight' => 1,
  );
  $table['#columns']['model'] = array(
    'cell' => array(
      'data' => t('SKU'),
      'class' => array('sku'),
    ),
    'weight' => 2,
  );
  if (user_access('administer products')) {
    $table['#columns']['cost'] = array(
      'cell' => array(
        'data' => t('Cost'),
        'class' => array('cost'),
      ),
      'weight' => 3,
    );
  }
  $table['#columns']['price'] = array(
    'cell' => array(
      'data' => t('Price'),
      'class' => array('price'),
    ),
    'weight' => 4,
  );
  $table['#columns']['total'] = array(
    'cell' => array(
      'data' => t('Total'),
      'class' => array('total'),
    ),
    'weight' => 5,
  );

  if (!empty($order->products)) {
    $build = uc_order_product_view_multiple($order->products);
    $table['#rows'] = $build['uc_order_product'];
  }
  else {
    $table['#rows'][]['product'] = array(
      '#markup' => t('This order contains no products.'),
      '#cell_attributes' => array('colspan' => 'full'),
    );
  }

  return $table;
}

located on line 1058 in uc_order.order_pane.inc which can be found in mysite/sites/all/modules/ubercart/uc_order/uc_order.order_pane.inc.

I took a look at http://www.ubercart.org/docs/developer/7512/tapir_tables_api and wrote this code inside my template.php file inside my theme but it did not change

function my_theme_tapir_table_alter(&$table, $table_id) {
    if ($table_id == 'uc_op_products_view_table') {
      $table['#columns']['cost']['access'] = FALSE;
    }
  }

I saved, cleared cache, run cron and yet no changes. the "cost" column still appears on the page. Any help?