remove macos github action

Author: kkbrum

.github/workflows/R-CMD-check.yaml

@@ -18,7 +18,6 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - {os: macos-latest,   r: 'release'}
           - {os: windows-latest, r: 'release'}
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,   r: 'release'}
@@ -39,11 +38,6 @@ jobs:
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
-      - name: Clean up any corrupted lockfiles
-        run: |
-          rm -f .github/pkg.lock
-          mkdir -p .github
-
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           dependencies: '"hard"'