Revert "feat: add pr preview ci"

This reverts commit 0c740538617742949db137cf523dcc7a631eb1bd.

.github/workflows/preview.yml

@@ -1,41 +0,0 @@
-name: Preview webui
-
-on:
-  pull_request_target:
-    paths:
-      - 'webui/**'
-    types: [opened, synchronize, reopened, closed]
-
-jobs:
-  preview:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-
-      - name: Set up Node
-        uses: actions/setup-node@v2
-        with:
-          node-version: '14'
-
-      - name: Install dependencies
-        run: |
-          cd webui/
-          npm install
-
-      - name: Build webui
-        run: |
-          cd webui/
-          npm run build
-
-      - uses: afc163/surge-preview@v1
-        id: preview_step
-        with:
-          surge_token: ${{ secrets.SURGE_TOKEN }}
-          github_token: ${{ secrets.GITHUB_TOKEN }}
-          teardown: 'true'
-          dist: webui/build
-          build: |
-            echo "dummy"
-
-      - name: Get the preview_url
-        run: echo "url => ${{ steps.preview_step.outputs.preview_url }}"