docs for drop cloudflare pages pr

[alexanderniebuhr]

This PR removes references to Cloudflare Pages because we will drop support for it, it also removes the routes sections as this is not needed anymore, since out of the box everything will be configured for the user.

cc @ascorbic not sure how much you have WIP for this page and if we might get conflicted

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[ArmandPhilippot]

@alexanderniebuhr Matt's PR is here #12981 if you want to chime in it. I think the only difference is he doesn't remove everything in the "Routes" section.

[alexanderniebuhr]

Okay let's go with his one then.

[ArmandPhilippot]

Ah, I didn't see that you had already commented! 😅 Yeah, I think it makes sense to keep everything in the same place unless there is bigger changes to be made!