[bsp][stm32] remove useless configuration

bsp/stm32/libraries/templates/stm32l4xx/board/Kconfig

@@ -44,7 +44,7 @@ menu "On-chip Peripheral Drivers"
                 bool "Enable SPI1 TX DMA"
                 depends on BSP_USING_SPI1
                 default n
-                
+
             config BSP_SPI1_RX_USING_DMA
                 bool "Enable SPI1 RX DMA"
                 depends on BSP_USING_SPI1

bsp/stm32/stm32f103-atk-nano/board/Kconfig

@@ -73,21 +73,6 @@ menu "On-chip Peripheral Drivers"
                 depends on BSP_USING_UART3 && RT_SERIAL_USING_DMA
                 default n  
         endif    
-        
-    config BSP_USING_UART1
-        bool "Enable UART1"
-        select RT_USING_SERIAL
-        default y
-
-    config BSP_USING_UART2
-        bool "Enable UART2"
-        select RT_USING_SERIAL
-        default n
-
-    config BSP_USING_UART3
-        bool "Enable UART3"
-        select RT_USING_SERIAL
-        default n
 
     menuconfig BSP_USING_TIM
         bool "Enable timer"