ia64: remove the unused pci_iommu_shutdown function

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/include/asm/iommu.h

@@ -5,7 +5,6 @@
 /* 10 seconds */
 #define DMAR_OPERATION_TIMEOUT (((cycles_t) local_cpu_data->itc_freq)*10)
 
-extern void pci_iommu_shutdown(void);
 extern void no_iommu_init(void);
 #ifdef	CONFIG_INTEL_IOMMU
 extern int force_iommu, no_iommu;

arch/ia64/kernel/pci-dma.c

@@ -37,11 +37,6 @@ static int __init pci_iommu_init(void)
 /* Must execute after PCI subsystem */
 fs_initcall(pci_iommu_init);
 
-void pci_iommu_shutdown(void)
-{
-	return;
-}
-
 void __init
 iommu_dma_init(void)
 {