Re: CfC: Drop advisory technique H46

As Jon Avila has commented/tested (backing up James initial suggestion) 
that this does actually work on iOS and as that represents a valid use 
case, we will retain this technique.

Thanks

Josh
> Joshue O Connor <mailto:josh@interaccess.ie>
> 1 March 2016 17:35
> CALL FOR CONSENSUS  ends Friday 4th at 2:30am Boston time.
>
> NOTE: This is an advisory technique. There may be a valid use case on 
> iOS but reports are unsubstantiated. [1]
>
> H46 doesn't really work in modern AT:
>
> http://www.powermapper.com/tests/screen-readers/media/embed-noembed-after/ 
>
> http://www.powermapper.com/tests/screen-readers/media/embed-noembed-inside/ 
>
>
> Some WCAG failures trigger fewer problems than this sufficient technique.
>
> Proposed Change:
> Remove technique.
>
> Worth noting that an alternative technique based on FIGCAPTION does 
> seem to work well:
>
> http://www.powermapper.com/tests/screen-readers/media/embed-figcaption/
>
> If you have concerns about this proposal and feel that those concerns 
> result in you not being able to live with this position, please let 
> the group know before the CfC deadline.
>
> [1] https://github.com/w3c/wcag/issues/128
>
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