Revert "build: push pull request images to ghcr.io"

This reverts commit a8353e3.

.github/workflows/build-pull-request.yml

@@ -29,20 +29,12 @@ jobs:
       - name: Set up docker
         uses: docker/setup-buildx-action@v3
 
-      - name: Login to GitHub container registry
-        uses: docker/login-action@v3
-        with:
-          registry: ghcr.io
-          username: ${{ github.actor }}
-          password: ${{ secrets.GITHUB_TOKEN }}
-
       - name: Build and export to Docker
         uses: docker/build-push-action@v5
         with:
           context: .
           tags: ${{ env.IMAGE_NAME }}:${{ env.TAG }}
           load: true
-          push: true
           cache-from: |
             type=local,src=/home/runner/.buildx-cache
             type=registry,ref=${{ env.IMAGE_NAME }}:latest