More flake fixes

channels/handler.py

@@ -10,7 +10,6 @@ from threading import Lock
 from django import http
 from django.core import signals
 from django.core.handlers import base
-from django.core.management.color import color_style
 from django.core.urlresolvers import set_script_prefix
 from django.utils import six
 from django.utils.functional import cached_property

channels/management/commands/runserver.py

@@ -104,6 +104,7 @@ class Command(RunserverCommand):
 
         sys.stderr.write(msg)
 
+
 class WorkerThread(threading.Thread):
     """
     Class that runs a worker