Bluetooth: samples: Remove workqueue stack configuration
Bluetooth: samples: Remove workqueue stack configuration

Fixed value used is too low causing overflow in nrf53.  Use default
value instead.

Signed-off-by: Azizah Ibrahim <9582193569194975a00ddb1e3a7c0850c5d2585c@nordicsemi.no>

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