mb/pcengines/apu2: Remove unnecessary initialization

The variable is never read before being assigned a value at the end of
the function.

Change-Id: I3b42dcd564480005b2c520316933940d87b6e418
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38785
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>

src/mainboard/pcengines/apu2/mainboard.c

@@ -192,7 +192,7 @@ static int mainboard_smbios_type17(DMI_INFO *agesa_dmi, int *handle,
 				 unsigned long *current)
 {
 	struct smbios_type17 *t;
-	int len = 0;
+	int len;
 
 	t = (struct smbios_type17 *)*current;
 	memset(t, 0, sizeof(struct smbios_type17));