[3.11] pythongh-137638: Remove macos-13 from GitHub Actions (pythonGH-138002)

Adapted from pythonGH-137989.

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: zware

.github/workflows/reusable-macos.yml

@@ -24,7 +24,6 @@ jobs:
       matrix:
         os: [
           "macos-14",  # M1
-          "macos-13",  # Intel
         ]
     runs-on: ${{ matrix.os }}
     steps: