remove github ci

.github/workflows/ci.yml

@@ -1,44 +0,0 @@
-name: CI
-
-on:
-  pull_request:
-  push:
-    branches:
-      - main
-      - master
-
-jobs:
-  verify:
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v4
-
-      - name: Setup Node.js
-        uses: actions/setup-node@v4
-        with:
-          node-version: 20.19.0
-          cache: npm
-
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Check encoding
-        run: npm run check:encoding
-
-      - name: Lint
-        run: npm run lint:eslint
-
-      - name: Typecheck
-        run: npm run typecheck
-
-      - name: Test
-        run: npm run test
-
-      - name: Build
-        run: npm run build
-
-      - name: Validate content
-        run: npm run check:content