cpumask: remove unused mask field from struct irqaction.

This one snuck in after the patch which removed all the others.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
 arch/x86/kernel/setup.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1081,7 +1081,6 @@ void __init x86_quirk_time_init(void)
 			return;
 	}
 
-	irq0.mask = cpumask_of_cpu(0);
 	setup_irq(0, &irq0);
 }
 #endif /* CONFIG_X86_32 */