samples: hci_uart: Remove CONFIG_UART_NRF5_BAUD_RATE assignment

This symbol was removed in commit 748f724 ("serial: dts: remove
!HAS_DTS related Kconfig"). The setting should come from DTS now.

Signed-off-by: Ulf Magnusson <[email protected]>

Author: ulfalizer

samples/bluetooth/hci_uart/microbit.conf

@@ -4,7 +4,6 @@ CONFIG_UART_CONSOLE=n
 CONFIG_GPIO=y
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
-CONFIG_UART_NRF5_BAUD_RATE=115200
 CONFIG_UART_NRF5_FLOW_CONTROL=n
 CONFIG_MAIN_STACK_SIZE=512
 CONFIG_IDLE_STACK_SIZE=256