Delete review deploy cleanup old deleted job

What does this MR do?

I had originally added a review-deploy-cleanup-old-deleted files, to match the deploy-cleanup-old-deleted-files job for prod.

But the need for this is likely very rare, plus you can always just run the review-stop to delete the entire environment and then rerun the last pipeline to re-deploy.

So, I don't see any use for it, and I'm gonna delete it, and eliminate that complexity.

That leaves just the scheduled deploy-cleanup-old-deleted-files job as the only remaining coupling between the different sites and all the independent build+deploy jobs. Maybe we can eventually remove this last one too, once it's clearer how things will be split up and owned.

Related issues

Relates #8302 (closed)