Update Compiling_STM32.md

docs/Compiling_STM32.md

@@ -30,10 +30,7 @@ Flashing precompiled **binaries** is done very simple with the cable setup prese
 
 1. In order to compile successfully you need also to modify a maple library file. In ```....\hardware\Arduino_STM32\STM32F1\cores\maple\libmaple\usart_f1.c``` comment out the 2 functions as shown below. This is required to have low-level access to the USART interrupt. <br>
    ```
-   /* void __irq_usart1(void){
-   usart_irq(&usart1_rb, USART1_BASE);
-   }
-   
+   /* 
    void __irq_usart2(void){
    usart_irq(&usart2_rb, USART2_BASE);
    }