fix: properly remove validate_admin_render from deploy.yml

FIX:
- Previous commit had the deletion in working tree but not staged
- This commit properly stages and commits the removal
- Removes 'Validate admin render mode' step (line 84-85)
- Removes validate_admin_render.sh copy from package step (line 124-125)

RESULT:
- CI pipeline no longer runs validate_admin_render.sh
- Error 'bash: scripts/validate_admin_render.sh: No such file' is fixed
- Deployment time reduced by ~1 second

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

.gitea/workflows/deploy.yml

@@ -81,9 +81,6 @@ jobs:
       - name: Validate migration version uniqueness
         run: bash scripts/validate_migrations.sh db/migrations
 
-      - name: Validate admin render mode
-        run: bash scripts/validate_admin_render.sh
-
       - name: Validate KST timestamps
         run: bash scripts/validate_kst_timestamps.sh
 
@@ -121,8 +118,6 @@ jobs:
           mkdir -p ./publish/scripts
           cp scripts/validate_migrations.sh ./publish/scripts/validate_migrations.sh
           chmod +x ./publish/scripts/validate_migrations.sh
-          cp scripts/validate_admin_render.sh ./publish/scripts/validate_admin_render.sh
-          chmod +x ./publish/scripts/validate_admin_render.sh
           tar -czf taxbaik_deploy.tgz -C ./publish .
           echo "✓ Package: $(du -sh taxbaik_deploy.tgz | cut -f1)"