comenting out windows olderl-4 until future decision

Author: davidrsch

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

@@ -29,7 +29,7 @@ jobs:
 
           - {os: windows-latest, r: 'release'}
           # use 4.0 or 4.1 to check with rtools40's older compiler
-          - {os: windows-latest, r: 'oldrel-4'}
+          # - {os: windows-latest, r: 'oldrel-4'}
 
           - {os: ubuntu-latest,  r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-latest,  r: 'release'}