fix: drop npm workflow

.github/workflows/npm-package.yml

@@ -1,17 +0,0 @@
-name: Npm Package
-on:
-  release:
-    types: [published]
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v2
-    - uses: actions/setup-node@v2
-      with:
-        node-version: '14.x'
-        registry-url: 'https://registry.npmjs.org'
-    - run: npm ci
-    - run: npm publish
-      env:
-        NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}