[PATCH 15 of 17] subrepo: remove superfluous pass statements

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1506771951 14400
#      Sat Sep 30 07:45:51 2017 -0400
# Node ID 050e03d6e79c6465b9f2644facccb340ab1f9b78
# Parent  83b1dba69bcc3474fb7ec09ddbbccd55cda9ea17
subrepo: remove superfluous pass statements

diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -600,7 +600,6 @@ class abstractsubrepo(object):
         walk recursively through the directory tree, finding all files
         matched by the match function
         '''
-        pass
 
     def forget(self, match, prefix):
         return ([], [])