ARM: vexpress: Remove init_irq declaration in machine description

Commit ebafed7a ("ARM: irq: Call irqchip_init if no init_irq function is
specified") removed the need to explictly setup the init_irq field in
the machine description when using only irqchip_init. Remove that
declaration for vexpress as well.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>

arch/arm/mach-vexpress/v2m.c

@@ -9,7 +9,6 @@
 #include <linux/clocksource.h>
 #include <linux/smp.h>
 #include <linux/init.h>
-#include <linux/irqchip.h>
 #include <linux/of_address.h>
 #include <linux/of_fdt.h>
 #include <linux/of_irq.h>
@@ -458,7 +457,6 @@ DT_MACHINE_START(VEXPRESS_DT, "ARM-Versatile Express")
 	.smp		= smp_ops(vexpress_smp_ops),
 	.map_io		= v2m_dt_map_io,
 	.init_early	= v2m_dt_init_early,
-	.init_irq	= irqchip_init,
 	.init_time	= v2m_dt_timer_init,
 	.init_machine	= v2m_dt_init,
 MACHINE_END