ci: remove setup-node step

Author: ph-fritsche

.github/workflows/build.yml

@@ -9,7 +9,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-node@v1
     - uses: bahmutov/npm-install@v1
     - run: yarn build