ARM: virt: 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 virt as well.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/mach-virt/virt.c

@@ -18,7 +18,6 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <linux/irqchip.h>
 #include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/smp.h>
@@ -39,7 +38,6 @@ static const char *virt_dt_match[] = {
 extern struct smp_operations virt_smp_ops;
 
 DT_MACHINE_START(VIRT, "Dummy Virtual Machine")
-	.init_irq	= irqchip_init,
 	.init_machine	= virt_init,
 	.smp		= smp_ops(virt_smp_ops),
 	.dt_compat	= virt_dt_match,