Hey stasia,
No this feature as described above for silently wiping a user will not become available.
Twitch will always sent through IRC a clearchat when a user gets timed out, and in the real chat you’ll see the message being deleted.
If you see " x has been timed out" that’s BTTV, which is separate from Twitch.
So no, it would not (and will not soon) be possible.
As far as I know the suggestion site twitch uses (https://twitch.uservoice.com/forums/297558-general) does not have this suggestion yet with a quick search. You might want to request it if you think multiple people want this.