removed ssh key from ci-docs

Not required as forced_phot repo is now public.

.github/workflows/ci-docs.yml

@@ -15,13 +15,6 @@ jobs:
       - uses: actions/setup-python@v2
         with:
           python-version: 3.x
-      - uses: webfactory/ssh-agent@v0.4.1
-        with:
-          ssh-private-key: ${{ secrets.FORCED_PHOT_DEPLOY_KEY }}
-      - name: Use ssh instead of https when cloning from github
-        run: |
-          git config --global url.ssh://git@github.com/.insteadOf https://github.com/;
-          git config --global core.sshCommand 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no'
       - uses: Gr1N/setup-poetry@v4
       - name: Install system dependencies
         run: sudo apt-get update && sudo apt-get install -y build-essential libpq-dev libgraphviz-dev