xen/pciback: Remove unused pcistub_get_pci_dev

pcistub_get_pci_dev() was added in 2009 as part of:
commit 30edc14bf39a ("xen/pciback: xen pci backend driver.")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <[e-mail]>
Reviewed-by: Juergen Gross <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Juergen Gross <[e-mail]>

drivers/xen/xen-pciback/pci_stub.c

···
 	return found_dev;
 }
 
-struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
-				    struct pci_dev *dev)
-{
-	struct pcistub_device *psdev;
-	struct pci_dev *found_dev = NULL;
-	unsigned long flags;
-
-	spin_lock_irqsave(&pcistub_devices_lock, flags);
-
-	list_for_each_entry(psdev, &pcistub_devices, dev_list) {
-		if (psdev->dev == dev) {
-			found_dev = pcistub_device_get_pci_dev(pdev, psdev);
-			break;
-		}
-	}
-
-	spin_unlock_irqrestore(&pcistub_devices_lock, flags);
-	return found_dev;
-}
-
 /*
  * Called when:
  *  - XenBus state has been reconfigure (pci unplug). See xen_pcibk_remove_device

drivers/xen/xen-pciback/pciback.h

···
 struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev,
 					    int domain, int bus,
 					    int slot, int func);
-struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
-				    struct pci_dev *dev);
 void pcistub_put_pci_dev(struct pci_dev *dev);
 
 static inline bool xen_pcibk_pv_support(void)