And remove rst file as well

sphinx complains otherwise.

doc/sphinx/reference/varnishreplay.rst

-=============
-varnishreplay
-=============
-
-------------------------
-HTTP traffic replay tool
-------------------------
-
-SYNOPSIS
-========
-varnishreplay [-D] -a address:port -r file
-
-DESCRIPTION
-===========
-
-The varnishreplay utility parses Varnish logs and attempts to
-reproduce the traffic. It is typically used to *warm* up caches or
-various forms of testing.
-
-The following options are available:
-
--a backend           Send the traffic over tcp to this server, specified by an
-   		     address and a port.  This option is
-   		     mandatory. Only IPV4 is supported at this time.
-
--D                   Turn on debugging mode.
-
--r file              Parse logs from this file.  The input file has to be from
-		     a varnishlog of the same version as the varnishreplay
-		     binary.  This option is mandatory.
-
-SEE ALSO
-========
-
-* varnishd(1)
-* varnishlog(1)
-
-HISTORY
-=======
-
-The varnishreplay utility and this manual page were written by Cecilie
-Fritzvold and later updated by Per Buer.
-
-COPYRIGHT
-=========
-
-This document is licensed under the same licence as Varnish
-itself. See LICENCE for details.
-
-* Copyright (c) 2007-2014 Varnish Software AS