alpha: drop pci_iomap/pci_iounmap from pci-noop.c

Jenkins disables PCI so asm-generic provides inline
stubs for these, we don't need offline stubs as well.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

arch/alpha/kernel/pci-noop.c

@@ -185,15 +185,3 @@ struct dma_map_ops alpha_noop_ops = {
 
 struct dma_map_ops *dma_ops = &alpha_noop_ops;
 EXPORT_SYMBOL(dma_ops);
-
-void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
-{
-	return NULL;
-}
-
-void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
-{
-}
-
-EXPORT_SYMBOL(pci_iomap);
-EXPORT_SYMBOL(pci_iounmap);