Remove windows specific code

red/src/printer/mod.rs

@@ -6,10 +6,7 @@ use tokio_util::codec::{Decoder, Encoder};
 use bytes::BytesMut;
 use tokio_serial::SerialPortBuilderExt;
 
-#[cfg(unix)]
 const DEFAULT_TTY: &str = "/dev/ttyUSB0";
-#[cfg(windows)]
-const DEFAULT_TTY: &str = "COM1";
 
 struct LineCodec;
 
@@ -47,7 +44,6 @@ pub async fn communicate() -> tokio_serial::Result<()> {
     let mut port = tokio_serial::new(tty_path, 115200).open_native_async()
         .expect("Unable to open serial port");
 
-    #[cfg(unix)]
     port.set_exclusive(false)
         .expect("Unable to set serial port exclusive to false");