[PATCH] Remove unused __syscall_count

Noone seems to use __syscall_count.  Remove the field from i386
irq_cpustat_t struct, and the generic accessor macros.

Because some archs have hardcoded asm references to offsets in this
structure, I haven't touched non-x86, but doing so is usually
trivial.

include/asm-i386/hardirq.h

@@ -7,7 +7,6 @@
 
 typedef struct {
 	unsigned int __softirq_pending;
-	unsigned int __syscall_count;
 	struct task_struct * __ksoftirqd_task; /* waitqueue is too large */
 	unsigned long idle_timestamp;
 	unsigned int __nmi_count;	/* arch dependent */

include/linux/irq_cpustat.h

@@ -29,8 +29,6 @@ extern irq_cpustat_t irq_stat[];		/* defined in asm/hardirq.h */
   /* arch independent irq_stat fields */
 #define softirq_pending(cpu)	__IRQ_STAT((cpu), __softirq_pending)
 #define local_softirq_pending()	softirq_pending(smp_processor_id())
-#define syscall_count(cpu)	__IRQ_STAT((cpu), __syscall_count)
-#define local_syscall_count()	syscall_count(smp_processor_id())
 #define ksoftirqd_task(cpu)	__IRQ_STAT((cpu), __ksoftirqd_task)
 #define local_ksoftirqd_task()	ksoftirqd_task(smp_processor_id())