Remove python setup step from ruff action

Author: reweeden

.github/workflows/lint.yml

@@ -23,9 +23,6 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: 3.9
       - uses: astral-sh/ruff-action@v1
         with:
           args: format --check --diff