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

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
diff --git a/drivers/mtd/maps/pci.c b/drivers/mtd/maps/pci.c
index d978c2e..48f4cf5 100644
--- a/drivers/mtd/maps/pci.c
+++ b/drivers/mtd/maps/pci.c
@@ -225,8 +225,6 @@
 static void
 intel_dc21285_exit(struct pci_dev *dev, struct map_pci_info *map)
 {
-	u32 val;
-
 	if (map->base)
 		iounmap(map->base);