irqchip: i8259: Remove unused i8259A_irq_pending

The i8259A_irq_pending function is unused. Remove the dead code.
Signed-off-by: NPaul Burton <paul.burton@imgtec.com>
Acked-by: NThomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14271/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/i8259.h

@@ -37,7 +37,6 @@
 
 extern raw_spinlock_t i8259A_lock;
 
-extern int i8259A_irq_pending(unsigned int irq);
 extern void make_8259A_irq(unsigned int irq);
 
 extern void init_i8259_irqs(void);

drivers/irqchip/irq-i8259.c

@@ -95,24 +95,6 @@ static void enable_8259A_irq(struct irq_data *d)
 	raw_spin_unlock_irqrestore(&i8259A_lock, flags);
 }
 
-int i8259A_irq_pending(unsigned int irq)
-{
-	unsigned int mask;
-	unsigned long flags;
-	int ret;
-
-	irq -= I8259A_IRQ_BASE;
-	mask = 1 << irq;
-	raw_spin_lock_irqsave(&i8259A_lock, flags);
-	if (irq < 8)
-		ret = inb(PIC_MASTER_CMD) & mask;
-	else
-		ret = inb(PIC_SLAVE_CMD) & (mask >> 8);
-	raw_spin_unlock_irqrestore(&i8259A_lock, flags);
-
-	return ret;
-}
-
 void make_8259A_irq(unsigned int irq)
 {
 	disable_irq_nosync(irq);