Remove docker login from github action

Author: ssbarnea

.github/workflows/tox.yml

@@ -31,12 +31,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v1
-      # Login needed to increase rate-limits
-      - name: Login to DockerHub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Find python version
         id: py_ver
         shell: python