Draft file containing a link to another draft file that is no longer needed. Can see the link in Edit Links, but there is no way of deleting it.
It's possible that the link was added in the Binder.
Go to File > Info > Binder.
If the link is found in the Binder you can select it and press the Delete Key on your keyboard.
Go back to Edit Links and verify that the link is no longer there.
Notes