patch: remove email import workaround for Python 2.4
Python 2.6 provides access to the sub-modules just fine. This workaround
is no longer needed since we no longer support Python 2.4.
--- a/mercurial/patch.py Sun Jun 21 15:18:49 2015 +0900
+++ b/mercurial/patch.py Mon Jun 22 10:09:08 2015 -0700
@@ -9,10 +9,6 @@
import collections
import cStringIO, email, os, errno, re, posixpath, copy
import tempfile, zlib, shutil
-# On python2.4 you have to import these by name or they fail to
-# load. This was not a problem on Python 2.7.
-import email.Generator
-import email.Parser
from i18n import _
from node import hex, short