x86/msi: Remove unused remap irq domain interface

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Christoph Hellwig <hch@lst.de>
Link: http://lkml.kernel.org/r/20170619235444.221049665@linutronix.de

arch/x86/include/asm/irq_remapping.h

@@ -55,7 +55,6 @@ extern struct irq_domain *
 irq_remapping_get_irq_domain(struct irq_alloc_info *info);
 
 /* Create PCI MSI/MSIx irqdomain, use @parent as the parent irqdomain. */
-extern struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent);
 extern struct irq_domain *
 arch_create_remap_msi_irq_domain(struct irq_domain *par, const char *n, int id);
 

arch/x86/kernel/apic/msi.c

@@ -180,12 +180,6 @@ struct irq_domain *arch_create_remap_msi_irq_domain(struct irq_domain *parent,
 	irq_domain_free_fwnode(fn);
 	return d;
 }
-
-struct irq_domain *arch_create_msi_irq_domain(struct irq_domain *parent)
-{
-	return pci_msi_create_irq_domain(NULL, &pci_msi_ir_domain_info, parent);
-}
-
 #endif
 
 #ifdef CONFIG_DMAR_TABLE