Hi Narasimhan,
We had the same issue several years ago and SAP issued Note 1399121 for us but that note only addressed the issue of assigning roles via Access Management, not on the role tab within individual objects. Looks like you want an extension of this functionality. The original response was that assigning users to SS objects in receiver Orgs does no harm even though they are not used, but we requested they be hidden to avoid possible confusion and to clean up the interface. You could raise a message but they'll likely tell you the same thing they told us and the solution you are looking for is probably more complex than the one issued for us.
Matt