Remove PRE_COMMIT_CACHE_PATH and PYTHON_VERSION_DEFAULT from CI config

Co-authored-by: puddly <[email protected]>

Author: Copilot

.github/workflows/ci.yml

@@ -10,8 +10,6 @@ jobs:
     with:
       CODE_FOLDER: zigpy_znp
       CACHE_VERSION: 2
-      PRE_COMMIT_CACHE_PATH:  ~/.cache/pre-commit
-      PYTHON_VERSION_DEFAULT: 3.9.15
       MINIMUM_COVERAGE_PERCENTAGE: 95
     secrets:
       CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}