mainboard/lenovo/x201/romstage.c: Remove unused function

Function was orginally used for reverse engineering.

Change-Id: I646dddd39e61b59358b29a49239c0a1de77c7e55
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/8158
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>
Tested-by: build bot (Jenkins)

src/mainboard/lenovo/x201/romstage.c

@@ -167,11 +167,6 @@ static inline u32 read_acpi32(u32 addr)
 	return inl(DEFAULT_PMBASE | addr);
 }
 
-static inline u16 read_acpi16(u32 addr)
-{
-	return inw(DEFAULT_PMBASE | addr);
-}
-
 static void set_fsb_frequency(void)
 {
 	u8 block[5];