simplify lint action

.github/workflows/lint_workflow.yml

@@ -1,7 +1,6 @@
 name: Lint workflow
 
 on:
-  # Trigger the workflow on push or pull request, but only for the master branch
   push:
     branches:
       - master
@@ -11,21 +10,15 @@ on:
 
 jobs:
   build:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: False
-      matrix:
-        python: [3.8]
-        os: [ubuntu-20.04]
-
+    runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: '2'
       - name: Setup Python
         uses: actions/setup-python@v1
         with:
-          python-version: ${{ matrix.python }}
+          python-version: 3.10
 
       - name: Install Tox
         run: pip install tox