ci: drop macOS from pre-IDM tests (#96)

Author: wpbonelli

.github/workflows/ci.yml

@@ -109,7 +109,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ ubuntu-latest, macos-13, windows-latest ]
+        os: [ ubuntu-latest, windows-latest ]
         python-version: [ "3.10", "3.11", "3.12", "3.13" ]
     defaults:
       run: