Expired Boosted Hexes are filtered when streaming from the DB so Clients don't have to know to ignore Boosted Hexes that should no longer apply.
Because mobile-config will no longer return expired boosted hexes, the BoostedHexes struct will also enforce that limitation in tests where it is used directly.
This PR builds on top of https://github.com/helium/oracles/pull/798.
Expired Boosted Hexes are filtered when streaming from the DB so Clients don't have to know to ignore Boosted Hexes that should no longer apply.
Because mobile-config will no longer return expired boosted hexes, the
BoostedHexesstruct will also enforce that limitation in tests where it is used directly.