MDEE-383: simplify orders exporter. (#228)

Author: obarcelonap

SalesOrdersDataExporter/Console/Command/ExportOnDemand.php

@@ -39,11 +39,3 @@ Reindexing is currently limited to orders modified in the last 7 days.
 
 Note that `commerce-data-export:orders:link` will assign uuids to the orders older than last 7 days but only orders
 modified within that timeframe will be exported.
-
-### Orders on demand
-Posibility to load sales orders from a date on SaaS Order Service. It's an independent process from usual sales order flow.
-To load orders:
-```shell
- bin/magento commerce-data-export:orders:export-on-demand yyyymmdd
-```
-The command will assing uuids to orders and index them in sales_data_export_on_demand_orders. As it is a on demand op, no index is scheduled.