diff --git a/world.py b/world.py
index 41a488a..9e32e1f 100644
--- a/world.py
+++ b/world.py
@@ -1,10 +1,7 @@
 import functools
-import string
 import os
 import os.path
-import time
 import multiprocessing
-import hashlib
 
 from PIL import Image