ACPI: bay: delete unused variable

drivers/acpi/bay.c: In function ‘bay_notify’:
drivers/acpi/bay.c:491: warning: unused variable ‘bay’
Signed-off-by: Len Brown <len.brown@intel.com>

drivers/acpi/bay.c

@@ -488,7 +488,6 @@ static struct acpi_device * bay_create_acpi_device(acpi_handle handle)
 static void bay_notify(acpi_handle handle, u32 event, void *data)
 {
 	struct acpi_device *dev;
-	struct bay *bay = data;
 
 	bay_dprintk(handle, "Bay event");