base: remove document.erp5.ConfigurationSave from metadata

this document is not in this bt but in erp5_configurator, having this
here prevents exporting again

bt5/erp5_base/bt/template_document_id_list

@@ -7,7 +7,6 @@ document.erp5.Career
 document.erp5.CategoryMovementGroup
 document.erp5.CausalityAssignmentMovementGroup
 document.erp5.CausalityMovementGroup
-document.erp5.ConfigurationSave
 document.erp5.Coordinate
 document.erp5.Currency
 document.erp5.DayMovementGroup