I’ve had a few folks that wanted to “get rid of” the post pages that are created automatically by WordPress. This is helpful if you use social media sharing plugins like Jetpack (which does many other things). When a sharing plugin is trying to decide what link to share, it doesn’t know about your outbound links so it shares the post page. For people that write additional content on that page or use comments or an interruption page, that works fine. But, if not, this is a useless page.
I wrote a very small plugin that redirects visitors from the post page directly to the posted link that is associated. This means that the post pages will “cease to exist” for posted links. Give it a try and let me know if you have any issues or questions.