boards: adafruit feather nrf52840 remove bossac

Remove bossac support for UF2 as it isn't neccessary.

Based on xiao_ble.

Signed-off-by: Jacob Winther <[email protected]>

Author: jacobw

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_sense_defconfig

@@ -17,9 +17,5 @@ CONFIG_UART_CONSOLE=y
 CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
 CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y
 
-# enable bossac
-CONFIG_BOOTLOADER_BOSSA=y
-CONFIG_BOOTLOADER_BOSSA_ADAFRUIT_UF2=y
-
 # Build UF2 by default, supported by the Adafruit nRF52 Bootloader
 CONFIG_BUILD_OUTPUT_UF2=y