erp5_mysql_innodb: before adding a new index, performances tests should be...

erp5_mysql_innodb: before adding a new index, performances tests should be driven (fix for 6c510537)

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_stock.sql

@@ -35,7 +35,6 @@ CREATE TABLE `stock` (
   KEY `node_uid` (`node_uid`),
   KEY `payment_uid` (`payment_uid`),
   KEY `function_uid` (`function_uid`),
-  KEY `ledger_uid` (`ledger_uid`),
   KEY `payment_request_uid` (`payment_request_uid`),
   KEY `project_uid` (`project_uid`),
   KEY `funding_uid` (`funding_uid`),