PEP8 and Pyflakes cleanup.

commonware/exceptions/middleware.py

@@ -21,14 +21,3 @@ class ScrubRequestOnException(object):
             # Clearing out all cookies in request.META. They will already
             # be sent with request.COOKIES.
             request.META['HTTP_COOKIE'] = '******'
-
-
-class HidePasswordOnException(ScrubRequestOnException):
-    def __init__(self):        
-        import warnings
-        warnings.warn(
-            "The middleware at `commonware.middleware.HidePasswordOnException` "
-            "is deprecated; use `commonware.middleware.ScrubRequestOnException` "
-            "instead.",
-            DeprecationWarning
-        )

commonware/request/middleware.py

@@ -4,6 +4,7 @@ from django.conf import settings
 
 TYPES = (socket.AF_INET, socket.AF_INET6)
 
+
 def is_valid(ip):
     for af in TYPES:
         try:

commonware/response/cookies/tests.py

@@ -1,6 +1,5 @@
 from django.http import HttpResponse
 from mock import patch
-from nose.tools import eq_
 
 from commonware.response.cookies.monkeypatch import patch_all