feat: module system is no longer experimental#11637
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Option deprecated and became no-op in Lean 4.27.0. The module system has been stabilised, per leanprover/lean4#11637 .
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The `releases_drafts/` folder contained two entries that were already covered in earlier releases: - `module-system.md` — the module system was stabilized in v4.27.0 (#11637) - `environment.md` — the `importModules`/`finalizeImport` `loadExts` change landed in v4.20.0 (#6325) Discovered while preparing the v4.29.0-rc1 release notes. 🤖 Prepared with Claude Code Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
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This PR declares the module system as no longer experimental and makes the
experimental.moduleoption a no-op, to be removed.