remove no longer needed buf.h header
diff --git a/gotweb/gotweb.c b/gotweb/gotweb.c
index 01741fc..caf7fc7 100644
--- a/gotweb/gotweb.c
+++ b/gotweb/gotweb.c
@@ -46,7 +46,6 @@
#include <kcgi.h>
#include <kcgihtml.h>
-#include "buf.h"
#include "gotweb.h"
#ifndef nitems