Revert "chore: keep the ci.yml step until the Tier H review"

The pull is open, so the ci.yml step retirement goes back in and the
head carries the whole change again.

Claude-Session: https://claude.ai/code/session_01JQwxbX3S5QrD29Ghii633f
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

.github/workflows/ci.yml

@@ -3539,9 +3539,6 @@ jobs:
       - name: Verify changed en strings were followed by the nine translations
         run: pnpm --dir ui run check:i18n-drift
 
-      - name: Verify the metadata-admin designer string tables stay paired
-        run: pnpm --dir ui run check:i18n-designer-parity
-
       - name: Type-check the ui scripts
         run: pnpm --dir ui run type-check:scripts