m68knommu: remove dead code from m68knommu timer code

Remove unused LED heartbeat code from m68knommu timer code.
Signed-off-by: NGreg Ungerer <gerg@uclinux.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/m68knommu/kernel/time.c

@@ -22,7 +22,6 @@
 #include <linux/timex.h>
 
 #include <asm/machdep.h>
-#include <asm/io.h>
 #include <asm/irq_regs.h>
 
 #define	TICK_SIZE (tick_nsec / 1000)
@@ -66,29 +65,6 @@ irqreturn_t arch_timer_interrupt(int irq, void *dummy)
 	  else
 	    last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
 	}
-#ifdef CONFIG_HEARTBEAT
-	/* use power LED as a heartbeat instead -- much more useful
-	   for debugging -- based on the version for PReP by Cort */
-	/* acts like an actual heart beat -- ie thump-thump-pause... */
-	if (mach_heartbeat) {
-	    static unsigned cnt = 0, period = 0, dist = 0;
-
-	    if (cnt == 0 || cnt == dist)
-		mach_heartbeat( 1 );
-	    else if (cnt == 7 || cnt == dist+7)
-		mach_heartbeat( 0 );
-
-	    if (++cnt > period) {
-		cnt = 0;
-		/* The hyperbolic function below modifies the heartbeat period
-		 * length in dependency of the current (5min) load. It goes
-		 * through the points f(0)=126, f(1)=86, f(5)=51,
-		 * f(inf)->30. */
-		period = ((672<<FSHIFT)/(5*avenrun[0]+(7<<FSHIFT))) + 30;
-		dist = period / 4;
-	    }
-	}
-#endif /* CONFIG_HEARTBEAT */
 
 	write_sequnlock(&xtime_lock);
 	return(IRQ_HANDLED);