[PATCH 04 of 17] byterange: remove superfluous pass statements

[Augie Fackler]

# HG changeset patch
# User Augie Fackler <augie at google.com>
# Date 1506771791 14400
#      Sat Sep 30 07:43:11 2017 -0400
# Node ID 6b594a14e15fa86291fadd25f45e280ba7e004a9
# Parent  fa24e8e3eb1bbd5f5dfac4af9c54bf3fb196afe4
byterange: remove superfluous pass statements

diff --git a/mercurial/byterange.py b/mercurial/byterange.py
--- a/mercurial/byterange.py
+++ b/mercurial/byterange.py
@@ -44,7 +44,6 @@ unquote = urlreq.unquote
 
 class RangeError(IOError):
     """Error raised when an unsatisfiable range is requested."""
-    pass
 
 class HTTPRangeHandler(urlreq.basehandler):
     """Handler that enables HTTP Range headers.