test removal of nodejs in codeql.yml

Based on [the 2nd part of
issuecomment-2225729098](#905 (comment))
we removed from `.github/workflows/codeql.yml`:

```
    - name: Setup node
      uses: actions/setup-node@v4
      with:
        node-version: '20'
```

We will see if the action performed as expected.

.github/workflows/codeql.yml

@@ -41,10 +41,6 @@ jobs:
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
-    - name: Setup node
-      uses: actions/setup-node@v4
-      with:
-        node-version: '20'
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL