docs: remove the preview-cleanup verification comment (#133)

Author: dcmcand

docs/src/content/docs/index.md

@@ -71,5 +71,3 @@ applications, with real access control and without rebuilding the serving stack
 > **Maturity:** this pack is at **alpha** (`v0.1.0-alpha.x`). See
 > [Known Limitations](https://github.com/nebari-dev/llm-serving-pack#known-limitations)
 > for current constraints.
-
-<!-- ci: exercise the docs build + preview-cleanup lifecycle -->