diff --git a/chapter4/maximum.py b/chapter4/maximum.py
index 58e5949..9d375bf 100644
--- a/chapter4/maximum.py
+++ b/chapter4/maximum.py
@@ -1,9 +1,6 @@
 import logging
-import math
 import random
 
-highest = math.inf
-
 logging.basicConfig(level=logging.DEBUG)
 logger = logging.getLogger(__name__)