bug#52553: b4 build failure

[Kyle Meyer]

Kyle Meyer writes:

> The latest version of b4 no longer calls dnspython's
> get_default_resolver(), so it avoids this failure.  I posted a series
> for that update at https://debbugs.gnu.org/48702
> (<20210527145046.11773-1-kyle@kyleam.com>).  It's a bit stale at this
> point and has conflicts with the current master.  I'll rebase it and
> send new version.

That series hasn't yet been applied, but b4 was updated in 0780164f1f
(gnu: b4: Update to 0.8.0, 2022-05-05), so I'm closing this issue.