board: remove duplicated comment for partition
board: remove duplicated comment for partition

There are two comments for partition in os/board and os/board/common.
"Board-Partition Options"

Let's remove one.

Signed-off-by: sunghan-chang <c954e25285721d8faa8b1a5c1ae2ef5a35338d32@samsung.com>

jsdosa/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,an4967/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jeongarmy/TizenRT,pillip8282/TizenRT,jeongarmy/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,jsdosa/TizenRT,jsdosa/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,jeongarmy/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,jsdosa/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT