Build error for custom board file

it worked before, I definitely used it with Magic3, for now you can remove one line in NRF5X.make

diff --git a/make/common/NRF5X.make b/make/common/NRF5X.make
index 57205a178..19b06343c 100644
--- a/make/common/NRF5X.make
+++ b/make/common/NRF5X.make
@@ -184,12 +184,13 @@ $(NRF5X_SDK_PATH)/modules/nrfx/drivers/src/nrfx_uarte.c \
 $(NRF5X_SDK_PATH)/integration/nrfx/legacy/nrf_drv_ppi.c \
 $(NRF5X_SDK_PATH)/integration/nrfx/legacy/nrf_drv_rng.c \
 $(NRF5X_SDK_PATH)/integration/nrfx/legacy/nrf_drv_twi.c \
-$(NRF5X_SDK_PATH)/integration/nrfx/legacy/nrf_drv_uart.c \
 $(NRF5X_SDK_PATH)/integration/nrfx/legacy/nrf_drv_spi.c \
 $(NRF5X_SDK_PATH)/components/libraries/atomic/nrf_atomic.c \
 $(NRF5X_SDK_PATH)/components/libraries/atomic_flags/nrf_atflags.c \