CI: no need in chown for ghcup anymore

Author: ulysses4ever

.github/workflows/validate.yml

@@ -71,16 +71,6 @@ jobs:
           key: ${{ runner.os }}-${{ matrix.ghc }}-20220419-${{ github.sha }}
           restore-keys: ${{ runner.os }}-${{ matrix.ghc }}-20220419-
 
-      # See https://github.com/haskell/cabal/pull/8739
-      - name: Sudo chmod to permit ghcup to update its cache
-        run: |
-          if [[ "${{ runner.os }}" == "Linux" ]]; then
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo mkdir -p /usr/local/.ghcup/cache
-            sudo ls -lah /usr/local/.ghcup/cache
-            sudo chown -R $USER /usr/local/.ghcup
-            sudo chmod -R 777 /usr/local/.ghcup
-          fi
       - uses: haskell/actions/setup@v2
         id: setup-haskell
         with: