add import

Author: dev0Guy

tests/test_e2e/test_e2e_single_slot.py

@@ -1,6 +1,6 @@
 import gymnasium as gym
 from gymnasium.utils.env_checker import check_env
-import src.server_simulator
+import src.server_simulator # noqa: F401
 
 env = gym.make("ClusterScheduling-single-slot-v1").unwrapped
 check_env(env)