Fix style in test

Signed-off-by: paul.profizi <[email protected]>

Author: PProfizi

tests/test_server.py

@@ -95,7 +95,7 @@ def test_server_env_path_cleanup(self, server_config):
         """Test that running and stopping servers does not pollute the system PATH."""
         from ansys.dpf.core.server_types import get_system_path
         path_len_init = len(get_system_path())
-        server_0 = dpf.core.start_local_server(config=server_config)
+        _ = dpf.core.start_local_server(config=server_config)
         assert len(get_system_path()) == path_len_init
 
     def test_start_local_server_with_config(self, server_config):