[PATCH 13 of 17] patch: remove superfluous pass statements

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1506771907 14400
#      Sat Sep 30 07:45:07 2017 -0400
# Node ID 5802876c662320ca23433eccfc2c6ed1475fb6c6
# Parent  09e901272db94667bc14dc8455a2299d540bb021
patch: remove superfluous pass statements

diff --git a/mercurial/patch.py b/mercurial/patch.py
--- a/mercurial/patch.py
+++ b/mercurial/patch.py
@@ -442,7 +442,6 @@ class abstractbackend(object):
         which failed to apply and total the total number of hunks for this
         files.
         """
-        pass
 
     def exists(self, fname):
         raise NotImplementedError