chore(ci): remove retired Codex review workflows (#309)

Co-authored-by: Codex <noreply@openai.com>

Author: Pigbibi

.github/codex_auto_merge_policy.json

@@ -627,8 +627,7 @@ Every change follows the mandated PR workflow:
 2. Commit with format `type(scope): description`
 3. Push and open PR
 4. CI must pass (lint, type check, tests)
-5. Codex Review must have no blocking items
-6. Merge PR, then delete remote + local branches
+5. Merge PR, then delete remote + local branches
 
 ### 7.3 Scheduler Timezone Rules
 

.github/workflows/codex_pr_review.yml

@@ -15,5 +15,4 @@ ignore = [
 ]
 
 [lint.per-file-ignores]
-"scripts/gate_codex_app_review.py" = ["E701", "E702"]
 "tests/*.py" = ["E402"]