src/southbridge: Remove unused <string.h>

Change-Id: Idc0cd9d6865cd9c1b95e6c838795cce9dbc643a3
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/60554
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/southbridge/intel/lynxpoint/early_me.c b/src/southbridge/intel/lynxpoint/early_me.c
index 9f47740..6c73c33 100644
--- a/src/southbridge/intel/lynxpoint/early_me.c
+++ b/src/southbridge/intel/lynxpoint/early_me.c
@@ -5,7 +5,7 @@
 #include <console/console.h>
 #include <delay.h>
 #include <halt.h>
-#include <string.h>
+
 #include "me.h"
 #include "pch.h"