Remove cosign

.github/workflows/docker-image.yml

@@ -13,12 +13,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Install cosign
-        if: github.event_name != 'pull_request'
-        uses: sigstore/[email protected]
-        with:
-          cosign-release: 'v2.4.1'
-
       - name: Set up QEMU
         uses: docker/[email protected]
 
@@ -50,12 +44,4 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           outputs: type=image,name=target
           cache-from: type=gha
-          cache-to: type=gha,mode=max
-
-      - name: Sign the published Docker image
-        if: ${{ github.event_name != 'pull_request' }}
-        env:
-          TAGS: ${{ steps.meta.outputs.tags }}
-          DIGEST: ${{ steps.build-and-push.outputs.digest }}
-        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
-
+          cache-to: type=gha,mode=max