chore: dele the obsolete deploy to demo

.github/workflows/demoDeploy.yml

@@ -1,29 +0,0 @@
-#
-#name: (Obsolete) Deploy to demo (VM)
-#
-#on:
-#  push:
-#    branches:
-#      - 'demo'
-#    paths:
-#      - 'src/**'
-#  repository_dispatch:
-#    types: deploy-to-demo
-#
-#jobs:
-#  build:
-#    runs-on: ubuntu-latest
-#    steps:
-#      - name: Install SSH key
-#        uses: shimataro/ssh-key-action@v2
-#        with:
-#          key: ${{ secrets.SSH_KEY }}
-#          known_hosts: ${{ secrets.KNOWN_HOSTS }}
-#      - name: Use Node.js 12.x
-#        uses: actions/setup-node@v1
-#      - uses: actions/checkout@v2
-#        with:
-#          ref: demo
-#      - run: npm install
-#      - run: npm run build:demo:prod
-#      - run: rsync -r --delete-after dist/. "${{ secrets.REMOTE_URL }}":"${{ secrets.ADDRESS }}"