[PATCH 2/3] README: stop trying to track supported versions

[Stephen Finucane]

On Tue, 2019-10-29 at 18:26 +1100, Daniel Axtens wrote:
> We're not doing a good job of it, the versions are out of date and
> we keep forgetting to update the README. We are a bit better at
> making release notes, so just point people there.
> 
> Signed-off-by: Daniel Axtens <dja at axtens.net>

Same comments as previous patch.

Reviewed-by: Stephen Finucane <stephen at that.guru>