Remove sparse clone

Author: ivanperez-keera

.github/workflows/repo-ghc-8.6-cabal-2.4.yml

@@ -31,8 +31,6 @@ jobs:
       #     echo "$HOME/.cabal/bin" >> $GITHUB_PATH
 
     - uses: actions/checkout@v4
-      with:
-        sparse-checkout: .
 
     - name: Create sandbox
       run: |