settings: Remove outdated comment
settings: Remove outdated comment

Starting with Zephyr 2.1, the back-end must filter out all old entities
and call the callback with only the newest entity.

Signed-off-by: Reto Schneider <cd29db203813b56a5006d9884d446b92bc63b915@husqvarnagroup.com>

zephyrproject-rtos/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,galak/zephyr,finikorg/zephyr,finikorg/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr