github: don't pass addtional arguments to mypy in github workflows

We have "pyproject.toml" with configuration for mypy. We don't
need to specify command line arguments in the github action. The
configured defaults are already suitable.

.github/workflows/lint-test.yml

@@ -39,7 +39,7 @@ jobs:
     - name: Type check with Mypy
       run: |
        mypy --version
-       mypy --strict --config-file mypy.ini .
+       mypy
     - name: Run tests with Pytest
       run: |
        pytest --version