revert: drop redundant utility channel promote

.gitea/workflows/build-binaries.yml

@@ -69,21 +69,3 @@ jobs:
                 "${api}/releases/${id}/assets?name=$(basename "$f")"
             done
           '
-
-      - name: Promote channel
-        if: github.event_name == 'push' && startsWith(github.ref, 'refs/tags/v')
-        env:
-          TAG: ${{ github.ref_name }}
-          GITEA_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
-          GITEA_SERVER: ${{ github.server_url }}
-          GITEA_OWNER: ${{ github.repository_owner }}
-          GITEA_REPO: ${{ github.repository }}
-        run: |
-          nix develop --command bash -c '
-            set -euo pipefail
-            if [[ "$TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-              bash scripts/promote-sow-tools.sh release "$TAG"
-            else
-              printf "unsupported tag for service tier: %s\n" "$TAG" >&2; exit 1
-            fi
-          '

.gitea/workflows/build-image.yml

@@ -50,22 +50,3 @@ jobs:
           bash scripts/emit-release-fragment.sh
       - uses: actions/upload-artifact@v3
         with: { name: release-fragment, path: release-fragment.json }
-
-      # Service tier: only vX.Y.Z → release; anything else rejects.
-      # SHA is the 12-char git SHA from the "Resolve tag" step above.
-      - name: Promote channel
-        env:
-          TAG: ${{ github.ref_name }}
-          SHA: ${{ steps.tag.outputs.sha }}
-          GITEA_TOKEN: ${{ secrets.PACKAGE_TOKEN }}
-          GITEA_SERVER: ${{ github.server_url }}
-          GITEA_OWNER: ${{ github.repository_owner }}
-          REGISTRY_HOST: ${{ env.REGISTRY }}
-          REGISTRY_USER: ${{ secrets.REGISTRY_USER }}
-          REGISTRY_PASSWORD: ${{ secrets.REGISTRY_PASSWORD }}
-        run: |
-          if [[ "$TAG" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-            nix shell nixpkgs#skopeo --command bash scripts/promote-crucible.sh release "$SHA"
-          else
-            printf 'unsupported tag for service tier: %s\n' "$TAG" >&2; exit 1
-          fi