The --quality flag (basic|shiny|chrome) referenced mol-polecat-* formulas
that were removed in c47a746 ("Remove obsolete polecat formula files") but
the flag code was left behind, causing errors when used.
Rather than restore the formulas, remove the flag entirely since:
- The default `gt sling <bead> <rig>` is now the standard workflow
- Formula-on-bead via `--on` or `--molecule` covers custom workflows
- The quality-level formulas were intentionally deprecated
Removes:
- --quality/-q flag and help text
- qualityToFormula() function
- Quality Levels section from command documentation
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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