[6.0] d25a5c6dd Remove spurios old prototype

[Dridi Boukelmoune]

commit d25a5c6dda60cf6ebd7f2db4c52b4e28f086ea64
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Wed Jun 6 12:55:14 2018 +0000

    Remove spurios old prototype

diff --git a/include/vfil.h b/include/vfil.h
index 48d6f6215..25f3b3ac6 100644
--- a/include/vfil.h
+++ b/include/vfil.h
@@ -34,7 +34,6 @@ struct vfil_path;
 
 void VFIL_null_fd(int);
 
-int seed_random(void);
 char *VFIL_readfile(const char *pfx, const char *fn, ssize_t *sz);
 int VFIL_writefile(const char *pfx, const char *fn, const char *buf, size_t sz);
 int VFIL_nonblocking(int fd);