If it is no entry at both ends, it would be better to tag it with access=no (possibly with an explanatory note=* tag) rather than delete an object which is clearly visible on the aerial imagery. Deleting something instead of changing its tags may result in someone adding it back from aerial imagery later, without any details of access restrictions only visible on the ground.

If it is just no entry at one end, the oneway=yes tag it had already covered this, as long as it was operating in the right direction.