[Gitar] Cleaning up stale flag: sample-feature with value true

[gitar-bot-staging[bot]]

This automated PR permanently enables the sample-feature feature flag.

Details

Triggered via https://github.com/gitarcode/launchdarkly-hello-java/issues/689#issuecomment-2469336751 by @optimus-primal[bot]

---

This automated PR was generated by Gitar. View docs.

[optimus-primal[bot]]

Confirming code cleanup...🤖