Remove internal planning link from public examples docs

The public examples-and-references page linked to
internal/planning/examples-catalog-and-repo-naming-plan.md, but
internal/ is explicitly excluded from the published docs site
(see internal/README.md). The relative link only resolved on GitHub
and was a dead link for users on the docs site. Drop the paragraph
since the planning doc is contributor-facing, not user-facing.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: justin808

docs/oss/getting-started/examples-and-references.md

@@ -88,9 +88,5 @@ point for new evaluations.
 
 - Legacy full app: [shakacode/react-webpack-rails-tutorial](https://github.com/shakacode/react-webpack-rails-tutorial) — older production-style app with a [live demo at reactrails.com](https://reactrails.com). Still useful as a historical reference, but not the recommended starting point for new projects.
 
-For the full list of repos being de-emphasized or archived, see the internal
-[examples-catalog and repo-naming plan](../../../internal/planning/examples-catalog-and-repo-naming-plan.md)
-in this repository.
-
 If you are choosing a public reference repo for docs, talks, or adoption work,
 start with the repos above.