Remove workaround for ghcup GH runner issue (#4982)

Original issue: actions/runner-images#7061

Author: crtschin

.github/actions/setup-build/action.yml

@@ -23,14 +23,6 @@ inputs:
 runs:
   using: "composite"
   steps:
-    - name: Workaround runner image issue
-      if: runner.os == 'Linux'
-      # https://github.com/actions/runner-images/issues/7061
-      run: |
-        sudo mkdir -p /usr/local/.ghcup
-        sudo chown -R $USER /usr/local/.ghcup
-      shell: bash
-
     - uses: haskell-actions/setup@v2.11
       id: HaskEnvSetup
       with: