phase29ap(p7): remove pattern9 legacy routing

docs/development/current/main/phases/phase-29ap/README.md

@@ -83,5 +83,14 @@ Gate (SSOT):
 
 ## Next (planned)
 
-- P7: Pattern9 legacy table removal decision
-  - `docs/development/current/main/phases/phase-29ap/P7-PATTERN9-LEGACY-REMOVAL-DECISION-INSTRUCTIONS.md`
+## P7: Pattern9 legacy table removal ✅
+
+- Scope:
+  - Pattern9 is not referenced by stdlib/quick/gate; only legacy pack SKIP remains.
+  - Removed Pattern9 from JoinIR legacy table (plan/composer remains SSOT).
+- Guardrails:
+  - No change to logs or error strings.
+
+## Next (planned)
+
+- P8: Follow-up legacy table shrink or leave as-is with justification