Delete auto-format.yml

Formatting is handled internally

.github/workflows/auto-format.yml

@@ -1,40 +0,0 @@
-name: auto-format
-
-on:
-  push:
-    branches: master
-
-jobs:
-  format:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v1
-      with:
-          node-version: 14
-
-    - name: NPM install
-      # Don't run postinstall because we don't need to install sub-packages.
-      run: npm ci --ignore-scripts
-
-    - name: Format
-      run: npm run format
-    
-    - name: Check if format produces git diff
-      id: ifChange
-      run: git diff --exit-code || echo "::set-output name=changed::yes"
-
-    - name: Create PR
-      if: steps.ifChange.outputs.changed == 'yes'
-      uses: peter-evans/create-pull-request@v2
-      with:
-        token: ${{ secrets.TEDIUM_BOT_GITHUB_ACCESS_TOKEN }}
-        commit-message: Auto-format
-        committer: Polymer GitHub Actions Robot <format-bot@polymer-project.org>
-        title: Auto-format master branch
-        body: This PR was auto generated by the auto-format GitHub action.
-        reviewers: azakus,asyncliz
-        branch: auto-format-action
-        branch-suffix: short-commit-hash
-        labels: "Ready for Google"