Remove Python 3.7 version check from workflow

Removed Python 3.7 from the list of versions to check.

Author: cclauss

.github/workflows/macOS_on_demand.yml

@@ -145,7 +145,6 @@ jobs:
           3.10
           3.9
           3.8
-          3.7
         allow-prereleases: true
     - run: |
         python3.7 --version