Killed some unused stuff inherited from Bill Jolitz. Note that since

this changes the size of the pcb struct, gdb will need to be rebuilt
or debugging won't work correctly.

Reviewed by:	Bruce Evans

sys/amd64/include/npx.h

@@ -34,7 +34,7 @@
  * SUCH DAMAGE.
  *
  *	from: @(#)npx.h	5.3 (Berkeley) 1/18/91
- *	$Id: npx.h,v 1.6 1994/11/05 22:59:09 bde Exp $
+ *	$Id: npx.h,v 1.7 1995/01/03 03:57:46 bde Exp $
  */
 
 /*
@@ -85,13 +85,6 @@ struct	save87 {
 	u_char	sv_pad[64];	/* padding; used by emulators */
 };
 
-/* Cyrix EMC memory - mapped coprocessor context switch information */
-struct	emcsts {
-	long	em_msw;		/* memory mapped status register when swtched */
-	long	em_tar;		/* memory mapped temp A register when swtched */
-	long	em_dl;		/* memory mapped D low register when swtched */
-};
-
 /* Intel prefers long real (53 bit) precision */
 #define	__iBCS_NPXCW__		0x262
 /* wfj prefers temporary real (64 bit) precision */