diff --git a/envs/memorymaze.py b/envs/memorymaze.py
index 531ebc0..0eaefd0 100644
--- a/envs/memorymaze.py
+++ b/envs/memorymaze.py
@@ -1,8 +1,3 @@
-import atexit
-import os
-import sys
-
-import cloudpickle
 import gym
 import numpy as np