Revert "fix hmr event, and avoid RSC fetch on any message" (#58452)
Reverts vercel/next.js#58403
Seems to be resulting in consistent CI failures
[x-ref](https://github.com/vercel/next.js/actions/runs/6856034177/job/18658084460)
[x-ref](https://github.com/vercel/next.js/actions/runs/6864944315/job/18667863954)