Unused synth_immediate method

[Okash Khawaja]

> On 20 Feb 2017, at 21:52, Samuel Thibault <samuel.thibault at ens-lyon.org> wrote:
> 
> Okash Khawaja, on lun. 20 févr. 2017 21:49:31 +0000, wrote:
>> Keeping spk_ttio_out() as it is also means that it mirrors
>> spk_serial_out behaviour more closely while having few side effects,
>> i.e. restarting of TTYs.
> 
> Actually, spk_serial_out does have the side effect of restarting TTYs
> etc. on error, that's done by the spk_wait_for_xmitr() call. That's
> actually one of the reasons why I was thinking that spk_ttyio_out should
> be doing it.

Ah okay. Right in that case it's actually better now because that side effect will at least be explicit. 

Thanks

> 
> Samuel