need to delete entries in table "sales_order_tax"

Hello,

Please add code to delete entries in sale_order_tax table

##############################
line  40
$table_sales_order_tax= Mage::getSingleton('core/resource')->getTableName('sales_order_tax');
##############################
line 189
if(in_array($table_sales_order_tax,$rsc_table))
{
$write->query("DELETE FROM ".$table_sales_order_tax."                 WHERE order_id='".mysql_escape_string($orderId)."'");
}
##############################