configs: remove unused CONFIG_COMMAND_HISTORY

$ git grep CONFIG_COMMAND_HISTORY
CHANGELOG:    CONFIG_COMMAND_HISTORY
include/configs/AP1000.h:#define CONFIG_COMMAND_HISTORY 1
include/configs/keymile-common.h:#define CONFIG_COMMAND_HISTORY         1
include/configs/manroland/common.h:#define CONFIG_COMMAND_HISTORY               1
$

Signed-off-by: Kim Phillips <kim.phillips@freescale.com>
Acked-by: Heiko Schocher <hs@denx.de>