Remove windows call - it is no longer used in this PR

serial_windows.go

@@ -479,12 +479,3 @@ func nativeOpen(portName string, mode *Mode) (*windowsPort, error) {
 	}
 	return port, nil
 }
-
-// enableRS485 enables RS485 functionality of driver via an ioctl if the config says so
-func (port *windowsPort) enableRS485(config *RS485Config) error {
-	if !config.Enabled {
-		return &PortError{code: NoPlatformSupportForRS485, causedBy: nil}
-	}
-
-	return nil
-}