Dead code: superseded/unused helpers in subagent_panel and token_ratio_learner plugins

Summary

Evidence chain

• state.finish: superseded by mark_done — whose docstring explicitly explains why popping immediately (what finish does) was replaced ("avoids the vanish-then-reappear gap"). Zero callers.
• state.fmt_elapsed: superseded by fmt_elapsed_entry (used at panel_render.py:185). Zero callers of the old variant.
• coalesce_patch.uninstall: install is invoked from register_callbacks.py:451; uninstall is never called (in __all__ only). Monkey-patch is never reverted — either wire into shutdown or delete.
• token_ratio_learner trio: register_callbacks.py imports only count_tokens and _record_token_ratio. set_ratios_path docstring says "mostly for testing" but no test imports it. Zero references repo-wide.
• Runtime trace: none executed across the full suite (11,691 tests).
• Git: fmt_elapsed/finish date to the panel plugin's introduction (0e0cef94) and the bottom-bar rewrite (ab0bcf50); superseding functions were added alongside without removing the originals.

Caveats

• Plugins are the extension surface of this codebase; user/project plugins living outside this repo could import these names. Low likelihood for these specific helpers, but grep your plugin ecosystem first.

Verification

pytest tests/plugins/ tests/ -q --no-cov
rg 'fmt_elapsed\b|state\.finish|coalesce_patch\.uninstall|get_ratio_for_model|list_known_ratios|set_ratios_path'

Filed by dead-code-detective-9a7d4c. Findings are read-only analysis; deletion requires human review.

Start with the listed helpers in code_puppy/plugins/subagent_panel/state.py, coalesce_patch.py, and token_ratio_learner/ratios.py, then inspect the cited callback imports and superseding functions. Run the provided rg command and review external plugin compatibility before deciding how each candidate should be handled. Run pytest tests/plugins/ tests/ -q --no-cov; done means the reviewed helpers have an intentional disposition and the suite remains green.