Most likely, a permanant redirect on pages is the best option. Though realistically, once the original pages are deleted, Google will remove them from it's index after awhile. So there is no risk of duplicate issue.do a 301 redirect all your old website to new domain.
You should rewrite it. It could still be in their system. Better safe than sorry
Hi,
I have microniche site but my main keyword got banned.
Now I want delete this site and create new one, of course using new domain.
How to properly delete articles and republish them that I don't get duplicate content flag?