Do not checkout repo when testing.

Author: Kasper Peeters

.github/workflows/homebrew-devel.yml

@@ -68,8 +68,6 @@ jobs:
     runs-on: macos-latest
 
     steps:
-    - uses: actions/checkout@v4
-
     - name: get dependencies
       run:  brew tap kpeeters/repo && brew install cadabra2-devel