Removed potentially superfluous pip cache

Author: mmottl

.github/workflows/pre-commit.yml

@@ -22,7 +22,6 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.13"
-          cache: "pip"
 
       # Cache pre-commit’s virtual envs + hook repos
       - name: Cache pre-commit envs