refactor: remove unused frontend build file

frontend/.github/workflows/node.js.yml

@@ -1,23 +0,0 @@
-name: Node.js CI
-
-on:
-  push:
-    branches: [ main ]
-  pull_request:
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-
-    strategy:
-      matrix:
-        node-version: [14.x]
-    steps:
-    - uses: actions/checkout@v3
-    - name: Use Node.js ${{ matrix.node-version }}
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}
-    - run: yarn install --frozen-lockfile
-    - run: yarn run test
-    - run: yarn run fmt:check