Flake8 fixes

django/utils/autoreload.py

@@ -234,7 +234,6 @@ def kqueue_code_changed():
         return True
 
 
-
 def code_changed():
     global _mtimes, _win
     for filename in gen_filenames():

django/utils/crypto.py

@@ -7,9 +7,7 @@ import hmac
 import struct
 import hashlib
 import binascii
-import operator
 import time
-from functools import reduce
 
 # Use the system PRNG if possible
 import random