[MTD] [MAPS] Remove unused variable after ROM API cleanup.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/maps/pci.c

@@ -225,8 +225,6 @@ intel_dc21285_init(struct pci_dev *dev, struct map_pci_info *map)
 static void
 intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
 {
-	u32 val;
-
 	if (map->base)
 		iounmap(map->base);