Remove an unused include of md5.h

Unused include of asterisk/md5.h in pbx_realtime.c . A commit needed to
test the commit message.

Merged-From: http://svn.asterisk.org/svn/asterisk/branches/1.8@341074

Merged-From: http://svn.asterisk.org/svn/asterisk/branches/10@341148


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@341198 65c4cc65-6c06-0410-ace0-fbb531ad65f3

pbx/pbx_realtime.c

@@ -44,7 +44,6 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/manager.h"
 #include "asterisk/cli.h"
 #include "asterisk/lock.h"
-#include "asterisk/md5.h"
 #include "asterisk/linkedlists.h"
 #include "asterisk/chanvars.h"
 #include "asterisk/sched.h"