Update tests-docker.yml (#1052) [skip ci]

.github/workflows/tests-docker.yml

@@ -37,12 +37,6 @@ jobs:
           images: winglian/axolotl
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
-      - name: Login to Docker Hub
-        uses: docker/login-action@v3
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
-      # guidance for testing before pushing: https://docs.docker.com/build/ci/github-actions/test-before-push/
       - name: Build and export to Docker
         uses: docker/build-push-action@v5
         with: