grep and make agree that this stuff is unused.
Index: arch/macppc/include/autoconf.h
===================================================================
RCS file: /home/vcs/cvs/openbsd/src/sys/arch/macppc/include/autoconf.h,v
retrieving revision 1.9
diff -u -p -r1.9 autoconf.h
--- arch/macppc/include/autoconf.h 22 Aug 2009 02:54:50 -0000 1.9
+++ arch/macppc/include/autoconf.h 29 Jun 2014 22:48:21 -0000
@@ -34,17 +34,6 @@
#include <machine/bus.h>
-/*
- * System types.
- */
-#define OFWMACH 0 /* Openfirmware drivers */
-#define POWER4e 1 /* V.I Power.4e board */
-#define PWRSTK 2 /* Motorola Powerstack series */
-#define APPL 3 /* Apple PowerMac machines (OFW?) */
-
-extern int system_type;
-
-/**/
struct confargs;
typedef int (*intr_handler_t)(void *);
