weird abort decl

src/cmd/ndb/dns.h

diff --git a/src/cmd/ndb/dns.h b/src/cmd/ndb/dns.h
index 6db0c23..5af7a1c 100755
--- a/src/cmd/ndb/dns.h
+++ b/src/cmd/ndb/dns.h
@@ -324,7 +324,6 @@
 extern void	dndump(char*);
 extern int	getactivity(Request*);
 extern void	putactivity(void);
-extern void	abort(); /* char*, ... */;
 extern void	warning(char*, ...);
 extern void	dncheck(void*, int);
 extern void	unique(RR*);