Remove the readdir files from os/win32. These are taken care of by APR now,

and they have been bothering me.  This is my first attempt at generating a
Makefile for Windows, but it seems to have worked for me.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@84296 13f79535-47bb-0310-9956-ffa450edef68