To Delete a Document with No Versions, or the Non-Active Version of a Document

Select one or more documents or non-active versions.
Select Document > Delete.
Click Yes when prompted to confirm the deletion.
Do one of the following:

If one of the selected documents is a member of a flat document set, click Yes when prompted to confirm deletion of the document belonging to the set.

or
If more than one of the selected documents is a member of a flat document set, click Yes to All when prompted to confirm deletion of all selected documents belonging to a set.

or
If one or more of the selected documents is a member of a flat document set, but you only want to delete documents that are not members of a set, click No when prompted. In this case, selected documents that are members of sets will not be deleted.