Remove Python 3.13 setup from test workflow

Removed Python setup step from the workflow.

Author: sbryngelson

.github/workflows/test.yml

@@ -48,11 +48,6 @@ jobs:
       - name: Clone
         uses: actions/checkout@v4
 
-      - name: Set up Python 3.13
-        uses: actions/setup-python@v5
-        with:
-          python-version: '3.13'
-
       - name: Setup MacOS
         if:   matrix.os == 'macos'
         run:  |