genirq: Remove export of kstat_irqs_cpu

The statistics accessor is only used by proc/stats and
show_interrupts(). Both are compiled in.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 0a7a090..78ff426 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -257,4 +257,3 @@
 	struct irq_desc *desc = irq_to_desc(irq);
 	return desc ? desc->kstat_irqs[cpu] : 0;
 }
-EXPORT_SYMBOL(kstat_irqs_cpu);