Code review comment for lp:~alan-griffiths/mir/death-to-SurfaceConfigurator

> Cool.
>
> I implemented and almost proposed this a while back, but then found it was
> used downstream somewhere. Are all downstream users weaned off it yet?

Nearly: https://code.launchpad.net/~mir-team/qtmir/compatibility-with-mir-API-changes/+merge/252589 line 161