BD_GUIDE.md generation was removed in 125e36d5 when bd onboard was
simplified to output a minimal snippet pointing to bd prime.
This commit:
- Removes stale BD_GUIDE.md references from CLAUDE.md
- Removes dead checkAndSuggestBDGuideUpdate() code from version_tracking.go
- Removes BD_GUIDE.md from UNINSTALLING.md file list
Closes#660 (already fixed in v0.30.7 via f1380e8b)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
3743e9ed70