this bit isn't used since %P is portable.  time to remove it.

Reference: /n/atom/patch/applied2013/nixnoarchfmt
Date: Sun Dec 29 04:03:47 CET 2013
Signed-off-by: quanstro@quanstro.net

--- /sys/src/nix/port/print.c	Sun Dec 29 04:03:25 2013
+++ /sys/src/nix/port/print.c	Sun Dec 29 04:03:26 2013
@@ -53,5 +53,4 @@
 {
 	fmtinstall('P', fmtP);
 	quotefmtinstall();
-	archfmtinstall();
 }
--- /sys/src/nix/port/portfns.h	Sun Dec 29 04:03:27 2013
+++ /sys/src/nix/port/portfns.h	Sun Dec 29 04:03:28 2013
@@ -14,7 +14,6 @@
 Block*		allocb(int);
 int		anyhigher(void);
 int		anyready(void);
-void		archfmtinstall(void);
 Image*		attachimage(int, Chan*, int, uintptr, uintptr);
 Page*		auxpage(usize);
 Block*		bl2mem(uchar*, Block*, int);