quest: retire release-pr-after-release (verified on a publishing release)

quest/m0/ci/README.md

@@ -182,5 +182,4 @@ The historical samples locate candidates; they are not controlled benchmarks.
 - [Drop main from the publish Environment](/quest/m0/ci/publish-release-only.md) - the maintainer narrows `publish` to `release` and release tags once no job naming it runs as `main`
 - [Release tags push to nix.moq.dev, and Cachix stops taking writes](/quest/m0/ci/cachix-retire.md) - backport `release-nix.yml` and its Just module to `release`, drop `cachix.yml`, prove a tag substitutes from nix.moq.dev, then revoke the Cachix token (the cache stays for old tags)
 - [Measure the Linux cache effect of native media exclusions](/quest/m0/ci/hakari-followups.md) - scheduled Linux jobs measure cache reuse after unrelated tests stop compiling PipeWire and libclang
-- [A release merge opens no stale release PR](/quest/m0/ci/release-pr-after-release.md) - `just rs release` publishes before it proposes, so a merged release isn't re-proposed
 - [Build two queue entries at once if it helps](/quest/m0/ci/queue-concurrency.md) - a measured trial of `maximumEntriesToBuild: 2` against the serial lane's burst latency