remove signing again [skip ci]

.gitea/workflows/build.yml

@@ -21,11 +21,6 @@ jobs:
           lfs: true
           submodules: true
 
-      - name: Install cosign
-        uses: sigstore/cosign-installer@v3
-      - name: Check cosign install
-        run: cosign version
-
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@v5
@@ -61,10 +56,4 @@ jobs:
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=registry,ref=harbor.pollinger.dev/build-cache/latex-build-container
-          cache-to: mode=max,image-manifest=true,oci-mediatypes=true,type=registry,ref=harbor.pollinger.dev/build-cache/latex-build-container
-
-      - name: Sign the published server image
-        env:
-          TAGS: ${{ steps.meta.outputs.tags }}
-          DIGEST: ${{ steps.build-and-push.outputs.digest }}
-        run: echo "${TAGS}" | xargs -I {} cosign sign --yes {}@${DIGEST}
+          cache-to: mode=max,image-manifest=true,oci-mediatypes=true,type=registry,ref=harbor.pollinger.dev/build-cache/latex-build-container