Removed unused import, unneeded due to [4144].

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6429 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/handlers/wsgi.py

@@ -5,7 +5,6 @@ from django.utils import datastructures
 from django.utils.encoding import force_unicode
 from django import http
 from pprint import pformat
-from shutil import copyfileobj
 from threading import Lock
 try:
     from cStringIO import StringIO