Revert "enable docker buildx"

This reverts commit 4fa5013.

Author: v1v

.github/workflows/build-images.yml

@@ -28,9 +28,6 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@b5ca514318bd6ebac0fb2aedd5d36ec1b5c232a2 # v3.10.0
-
       - run: ./util.sh --action build --registry ${{ env.REGISTRY }} --image-name ${{ env.IMAGE_NAME }}
         working-directory: .ci/docker