dev-python/six: remove unused patch.

dev-python/six/files/six-1.9.0-winreg.patch

@@ -1,27 +0,0 @@
-# HG changeset patch
-# User Benjamin Peterson <benjamin@python.org>
-# Date 1426865725 18000
-# Node ID c996ed1dc0064f45e691f1664d06001ae07fff00
-# Parent  7638872a6c760448ed8648d692c8eb702a29c361
-# Parent  24dc6a6f7384712152dd1e881c115fb4805be9ea
-Merged in mrossini/six (pull request #55)
-
-_winreg is added to the moves module under windows only
-
-diff --git a/six.py b/six.py
---- a/six.py
-+++ b/six.py
-@@ -298,8 +298,12 @@
-     MovedModule("urllib_robotparser", "robotparser", "urllib.robotparser"),
-     MovedModule("xmlrpc_client", "xmlrpclib", "xmlrpc.client"),
-     MovedModule("xmlrpc_server", "SimpleXMLRPCServer", "xmlrpc.server"),
--    MovedModule("winreg", "_winreg"),
- ]
-+#Add windows specific modules if needed
-+if sys.platform in ('win32', 'cygwin'):
-+    _moved_attributes += [
-+        MovedModule("winreg", "_winreg"),
-+    ]
- for attr in _moved_attributes:
-     setattr(_MovedItems, attr.name, attr)
-     if isinstance(attr, MovedModule):