Delete code-format.yml (#5487)

.github/workflows/code-format.yml

-# Run code formatting GitHub Action, can be replaced by this bot: https://github.com/marketplace/pre-commit-ci
-
-name: Code formatting
-
-on: # https://help.github.com/en/actions/reference/events-that-trigger-workflows
-  push:
-    branches: [master]
-  pull_request: {}
-
-jobs:
-  pep8-check-flake8:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@master
-      - uses: actions/setup-python@v2
-        with:
-          python-version: 3.7
-      - name: Install dependencies
-        run: |
-          pip install flake8
-          pip list
-        shell: bash
-      - name: PEP8
-        run: |
-          flake8 .
-
-  pre-commit-check:
-    runs-on: ubuntu-20.04
-    steps:
-      - uses: actions/checkout@v2
-        # for private repo - first is the checkout step, which needs to use unlimited fetch depth for pushing
-        with:
-          fetch-depth: 0
-      - uses: actions/setup-python@v2
-
-      - name: set PY
-        run: echo "PY=$(python -VV | sha256sum | cut -d' ' -f1)" >> $GITHUB_ENV
-      - uses: actions/cache@v2
-        with:
-          path: ~/.cache/pre-commit
-          key: pre-commit|${{ env.PY }}|${{ hashFiles('.pre-commit-config.yaml') }}
-
-      - uses: pre-commit/action@v2.0.3
-        # this action also provides an additional behaviour when used in private repositories
-        # when configured with a github token, the action will push back fixes to the pull request branch
-        with:
-          token: ${{ secrets.GITHUB_TOKEN }}