[Tangent alert]
Well, in order to delete any entry, it has to be toggled to draft mode first. So you could feasibly be deleting what was a published entry, so arguably, the confirmation could stay. Plus, the added overhead of a confirm screen isn't really a big deal if you consider that most people probably aren't deleting entries too frequently.
That said, this delete method isn't an intuitive concept, though I understand the intent behind it. Several times, I've stumbled over deleting entries before hunting around a few minutes and finally remembering how.
A better way might be to have a management screen with a list of both draft and published entries, each with a delete icon, and only for published entries ask for a confirmation.
