So the issue was solved and object has been deleted.
This procedure is valid only for SMS ! MDS and CMA is not supported (the only way how to get rid of it is to delete reference in GuiDBedit tool).
All what has to be done on SMS is to activate "Endpoint Policy Management", install database, connect via SmartEndpoint application and delete following 2 rules:
I have no idea why this was in place, but it might be due to very old environment deployed about in 2010 year ...
Thank you everyone for your time, the story can be closed 🙂
Kind regards,
Jozko Mrkvicka