phase-g slice 2: supersession ledger + registry remap + shared deletion

- plans/2026-10-03-phaseG-evidence-provenance-supersession.md: the
  slice-level ledger — port table (6/6, commits + parity + consumer
  proof), 12-step doctrine discharge, vintage-merge disclosures
  (symmetry guard, scan_text repair, port-1 sequence break), consumer
  map, live-data rules honored.
- shared/audit_ledger.py DELETED (superseded; zero importers verified
  by sweep; deployed shim + Rust core proven live before removal —
  language-governance rule ⑥).
- coverage registry: audit_ledger removed from SHARED_D.
- regression gate: exit 0 pre- and post-deletion.

scripts/structural_coverage_audit.py

@@ -166,7 +166,6 @@ SCRIPTS_C = {"fake_worker", "tui_startup_canary"}
 
 # shared/ — harness-facing layer; mirrors of canonical src modules = D
 SHARED_D = {
-    "audit_ledger": "src/rune/audit_ledger.py",
     "dependency_tracker": "src/rune/dependency_tracker.py",
     "drift_cache": "src/rune/drift_cache.py",
     "drift_compression": "src/rune/drift_compression.py",