removed an unused workflow

.github/workflows/deploy.yaml

@@ -1,23 +0,0 @@
-name: Deploy
-on:
-  push:
-    branches: [ 'gh-pages' ]
-jobs:
-  publish:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
-          ref: 'gh-pages'
-      - name: Setup GCloud
-        uses: google-github-actions/setup-gcloud@master
-        with:
-          version: '285.0.0'
-          service_account_key: ${{ secrets.GCP_SA_KEY }}
-          export_default_credentials: true
-      - name: Restore git mtime
-        run: curl -Ss https://raw.githubusercontent.com/MestreLion/git-tools/f3cc70b73200154d027554714c354f35a08680ed/git-restore-mtime | python3
-      - name: Sync
-        run: gsutil -m rsync -r -d -x "^\.|^[a-f\d-]{36}$|^README\.md$" . gs://app.keeweb.info/