Removed Github workflows

.github/workflows/main.yml

@@ -1,30 +0,0 @@
-name: github pages
-
-on:
-  push:
-    branches:
-      - master
-
-jobs:
-  deploy:
-    runs-on: ubuntu-18.04
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Setup Flutter
-        uses: subosito/flutter-action@v1
-        with:
-          channel: 'dev'
-
-      - name: Install
-        run: |
-          flutter config --enable-web
-          flutter pub get
-      - name: Build
-        run: cd example && flutter build web
-
-      - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
-        with:
-          deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
-          publish_dir: ./example/build/web