chore: simplify

.github/workflows/portal-loop.yml

@@ -48,32 +48,6 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
 
-  build-docker-image:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
-
-      - name: Build and push
-        uses: docker/build-push-action@v3
-        with:
-          context: .
-          push: false
-          cache-to: type=gha,mode=max
-          cache-from: type=gha
-          tags: |
-            ghcr.io/${{ github.repository_owner }}/${{ github.event.repository.name }}:test-portal-loop
-          outputs: type=docker,dest=/tmp/gno.tar
-
-      - name: Upload artifact
-        uses: actions/upload-artifact@v3
-        with:
-          name: ghcr.io/gnolang/gno:test-portal-loop
-          path: /tmp/gno.tar
-
   test-portal-loop-docker-compose:
     runs-on: ubuntu-latest
     timeout-minutes: 5