remove unused import
diff --git a/serial/serialposix.py b/serial/serialposix.py
index ccc974a..01848e9 100644
--- a/serial/serialposix.py
+++ b/serial/serialposix.py
@@ -34,7 +34,6 @@
 import struct
 import sys
 import termios
-import time
 
 import serial
 from serial.serialutil import SerialBase, SerialException, to_bytes, \