removed the slim Docker image since it does not build properly

.github/workflows/release.yml

@@ -53,26 +53,3 @@ jobs:
           dockerfile: Dockerfile
           image: video2x
           tags: latest, ${{ needs.setup.outputs.tag }}
-
-  container-variants:
-    name: Build and upload variants of the container
-    needs:
-      - setup
-      - create-release
-    strategy:
-      matrix:
-        version:
-          - slim-alpine
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v2
-      - uses: mr-smithers-excellent/docker-build-push@v5
-        name: Build & push the Docker image
-        with:
-          registry: ghcr.io
-          username: ${{ secrets.GHCR_USER }}
-          password: ${{ secrets.GHCR_TOKEN }}
-          dockerfile: Dockerfile.${{ matrix.version }}
-          image: video2x
-          tags: ${{ needs.setup.outputs.tag }}-${{ matrix.version }}