revert rcmdcheck

Author: dajmcdon

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

@@ -8,15 +8,13 @@ name: R-CMD-check
 
 jobs:
   R-CMD-check:
-    runs-on: macOS-latest
+    runs-on: ubuntu-latest
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}
       R_KEEP_PKG_SOURCE: yes
     steps:
       - uses: actions/checkout@v2
 
-      - uses: r-lib/actions/setup-pandoc@v2
-
       - uses: r-lib/actions/setup-r@v2
         with:
           use-public-rspm: true