xtensa: drop unused irq_err_count

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

arch/xtensa/kernel/irq.c

@@ -28,7 +28,6 @@
 #include <asm/uaccess.h>
 #include <asm/platform.h>
 
-atomic_t irq_err_count;
 DECLARE_PER_CPU(unsigned long, nmi_count);
 
 asmlinkage void do_IRQ(int hwirq, struct pt_regs *regs)
@@ -62,8 +61,6 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 #ifdef CONFIG_SMP
 	show_ipi_list(p, prec);
 #endif
-	seq_printf(p, "%*s: ", prec, "ERR");
-	seq_printf(p, "%10u\n", atomic_read(&irq_err_count));
 #if XTENSA_FAKE_NMI
 	seq_printf(p, "%*s:", prec, "NMI");
 	for_each_online_cpu(cpu)