You will need to contact the agency, Parks, or DEC that issued the lifetime license, privilege, or credential and request that they notify DMV to remove the icon.
Will you be doing this through a visit at a DMV office?
Yes. I probably will be.
In that case, you will be charged an amendment fee as required by the Vehicle and Traffic Law. It will be $12.50 for driver licenses or permits and $5.00 for ID cards.