diff --git a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c
index 1fbfc2a50f4cda0a4d78a0da33687bcf393e07f5..02f0b8ecf881190ee5e0b0168ee92a487c1d05b6 100644
--- a/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c
+++ b/bsp/stm32/stm32f103-blue-pill/applications/arduino_pinout/pins_arduino.c
@@ -42,12 +42,3 @@ const pin_map_t pin_map_table[]=
     {A5, RT_NULL, "adc1", 17}, /* ADC, On-Chip: internal reference voltage, ADC_CHANNEL_VREFINT */
     {A6, RT_NULL, "adc1", 16} /* ADC, On-Chip: internal temperature sensor, ADC_CHANNEL_TEMPSENSOR */
 };
-/* 
- * Before RTdunio is used, you can do some necessary initialization through this function
- */
-void initVariant()
-{
-    /* JTAG-DP Disabled and SW-DP enabled */
-    __HAL_RCC_AFIO_CLK_ENABLE();
-    __HAL_AFIO_REMAP_SWJ_NOJTAG(); 
-}
\ No newline at end of file