fix: unused import

Author: cmeesters

Diff for: tests/tests.py

@@ -2,7 +2,6 @@
 import snakemake.common.tests
 from snakemake_interface_executor_plugins.settings import ExecutorSettingsBase
 from unittest.mock import MagicMock, patch
-import sys
 import pytest
 
 from snakemake_executor_plugin_slurm import ExecutorSettings