diff --git a/16-coroutine/taxi_sim.py b/16-coroutine/taxi_sim.py
index 705418a..e9c4cc1 100644
--- a/16-coroutine/taxi_sim.py
+++ b/16-coroutine/taxi_sim.py
@@ -53,7 +53,6 @@ import random
 import collections
 import queue
 import argparse
-import time
 
 DEFAULT_NUMBER_OF_TAXIS = 3
 DEFAULT_END_TIME = 180