tests: Setup node is no longer required

Author: jcs090218

.github/workflows/activate.yml

@@ -28,10 +28,6 @@ jobs:
       with:
         version: ${{ matrix.emacs-version }}
 
-    - uses: actions/setup-node@v2
-      with:
-        node-version: '16'
-
     - uses: emacs-eask/setup-eask@master
       with:
         version: 'snapshot'