use python from ubuntu

Author: Jason2866

.github/workflows/push.yml

@@ -13,10 +13,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - uses: actions/setup-python@v2
-      with:
-        python-version: '3.8.10'
-        architecture: 'x64' 
     - name: Install dependencies
       run: bash ./tools/prepare-ci.sh
     - name: Build Arduino Libs