[HAL][UART] Correct DMA Rx abort procedure impact on ongoing Tx transfer in polling mode

Src/stm32f3xx_hal_uart.c

diff --git a/Src/stm32f3xx_hal_uart.c b/Src/stm32f3xx_hal_uart.c
index aa1bed1..9cc5f99 100644
--- a/Src/stm32f3xx_hal_uart.c
+++ b/Src/stm32f3xx_hal_uart.c
@@ -3579,7 +3579,6 @@
 {
   UART_HandleTypeDef *huart = (UART_HandleTypeDef *)(hdma->Parent);
   huart->RxXferCount = 0U;
-  huart->TxXferCount = 0U;
 
 #if (USE_HAL_UART_REGISTER_CALLBACKS == 1)
   /*Call registered error callback*/