remove seemingly redundant pyflakes references

.gitignore

@@ -6,7 +6,6 @@ junit-report.xml
 pylint.txt
 toy.py
 tox.ini
-violations.pyflakes.txt
 cover/
 build/
 docs/_build

requests/cookies.py

@@ -19,8 +19,6 @@ from .compat import cookielib, urlparse, urlunparse, Morsel
 
 try:
     import threading
-    # grr, pyflakes: this fixes "redefinition of unused 'threading'"
-    threading
 except ImportError:
     import dummy_threading as threading
 

requests/utils.py

@@ -32,8 +32,6 @@ from .structures import CaseInsensitiveDict, TimedCache, TimedCacheManaged
 from .exceptions import (
     InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
 
-_hush_pyflakes = (RequestsCookieJar,)
-
 NETRC_FILES = ('.netrc', '_netrc')
 
 DEFAULT_CA_BUNDLE_PATH = certs.where()