ci: disable github actions for now (lacks dep caching)

.github/workflows/nodejs.yml

@@ -1,20 +0,0 @@
-name: Node CI
-
-on: [push]
-
-jobs:
-  test:
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@v1
-    - name: Use Node.js
-      uses: actions/setup-node@v1
-      with:
-        node-version: '12.x'
-    - name: test
-      run: |
-        yarn
-        yarn test
-      env:
-        CI: true
-        TEST: true