arcada_ish: remove unlocked config option
The Unlocked config option doesn't really even apply to arcada, remove
as we get further along.
BRANCH=none
TEST=Flashed on to arcada without issue.
#ifndef __CROS_EC_BOARD_H
#define __CROS_EC_BOARD_H
-/*
- * Allow dangerous commands.
- * TODO: Remove this config before production.
- */
-#define CONFIG_SYSTEM_UNLOCKED
-
/*
* By default, enable all console messages except HC, ACPI and event
* The sensor stack is generating a lot of activity.
