ci: only use windows for now

Author: CGMossa

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

@@ -23,18 +23,18 @@ jobs:
       fail-fast: false
       matrix:
         config:
-          - { os: macos-latest, r: "oldrel-1" }
+          # - { os: macos-latest, r: "oldrel-1" }
+          # - { os: macos-latest, r: "oldrel" }
+          # - { os: macos-latest, r: "release" }
+          # - { os: macos-latest, r: "devel", http-user-agent: "release" }
           - { os: windows-latest, r: "oldrel-1" }
-          - { os: ubuntu-latest, r: "oldrel-1" }
-          - { os: macos-latest, r: "oldrel" }
           - { os: windows-latest, r: "oldrel" }
-          - { os: ubuntu-latest, r: "oldrel" }
-          - { os: macos-latest, r: "release" }
           - { os: windows-latest, r: "release" }
-          - { os: ubuntu-latest, r: "release" }
-          - { os: macos-latest, r: "devel", http-user-agent: "release" }
           - { os: windows-latest, r: "devel", http-user-agent: "release" }
-          - { os: ubuntu-latest, r: "devel", http-user-agent: "release" }
+          # - { os: ubuntu-latest, r: "oldrel-1" }
+          # - { os: ubuntu-latest, r: "oldrel" }
+          # - { os: ubuntu-latest, r: "release" }
+          # - { os: ubuntu-latest, r: "devel", http-user-agent: "release" }
 
     env:
       GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}