Revert "fix: ghcr.io build for mulitplatform. includes Apple silicon" (…

…#2199)

Broke builds, see
https://github.com/LAION-AI/Open-Assistant/actions/runs/4515995123

This reverts commit fa4c42d.

.github/workflows/docker-build.yaml

@@ -25,8 +25,6 @@ jobs:
       packages: write
     steps:
       - uses: actions/checkout@v3
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2.2.1
       - name: Login to container registry
@@ -62,4 +60,3 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
-          platforms: linux/amd64,linux/arm64