$NetBSD$

main.c: Remove unnecessary variable declaration of errno.

diff -r c8b10f57c096 -r aaf73ded1091 main.c
--- src/main.c~	Fri Jun 21 10:26:10 2019 +0000
+++ src/main.c	Fri Jun 21 10:29:07 2019 +0000
@@ -72,7 +72,6 @@
 #endif
 
 /* are these really needed? */
-extern int errno;
 extern int select();
 
 #include "defines.h"