Removed sign docker images in tag pipeline

.github/workflows/build-tag.yml

@@ -77,18 +77,3 @@ jobs:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-
-      # Sign the resulting Docker image digest except on PRs.
-      # This will only write to the public Rekor transparency log when the Docker
-      # repository is public to avoid leaking data.  If you would like to publish
-      # transparency data even for private images, pass --force to cosign below.
-      # https://github.com/sigstore/cosign
-      - name: Sign the published Docker image
-        env:
-          COSIGN_EXPERIMENTAL: "true"
-        # This step uses the identity token to provision an ephemeral certificate
-        # against the sigstore community Fulcio instance.
-        run: cosign sign ${{ env.GH_REPO }}/${{ env.IMAGE_NAME }}@${{ steps.build-and-push.outputs.digest }}
-
-      - name: Image digest
-        run: echo ${{ steps.build-and-push.outputs.digest }}