mb/lenovo/t440p/romstage.c: Drop empty function

There's a weak definition in chipset code that does nothing as well.

Change-Id: I2531e8b9d48eb4a1a667f22a81bb082ec98c1199
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43297
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tristan Corrick <tristan@corrick.kiwi>

src/mainboard/lenovo/t440p/romstage.c

@@ -24,10 +24,6 @@ static const struct rcba_config_instruction rcba_config[] = {
 	RCBA_END_CONFIG,
 };
 
-void mainboard_config_superio(void)
-{
-}
-
 void mainboard_romstage_entry(void)
 {
 	struct pei_data pei_data = {