Remove redundant variable.

Author: ghent360

Diff for: cores/arduino/stm32/usb/cdc/usbd_cdc_if.c

@@ -37,7 +37,6 @@
 USBD_HandleTypeDef hUSBD_Device_CDC;
 
 static bool CDC_initialized = false;
-static bool hostPortOpen = false;
 
 /* Received Data over USB are stored in this buffer       */
 CDC_TransmitQueue_TypeDef TransmitQueue;
@@ -170,7 +169,6 @@ static int8_t USBD_CDC_Control(uint8_t cmd, uint8_t *pbuf, uint16_t length)
     case CDC_SET_CONTROL_LINE_STATE:
       lineState =
         (((USBD_SetupReqTypedef *)pbuf)->wValue & 0x01) != 0; // Check DTR state
-      hostPortOpen = lineState;
       break;
 
     case CDC_SEND_BREAK:
@@ -249,7 +247,7 @@ void CDC_deInit(void)
 
 bool CDC_connected()
 {
-  return hUSBD_Device_CDC.dev_state == USBD_STATE_CONFIGURED && hostPortOpen;
+  return hUSBD_Device_CDC.dev_state == USBD_STATE_CONFIGURED && lineState;
 }
 
 void CDC_continue_transmit(void)