High-card stats are not getting deleted

run_truncate_stats(LastPruningTime, Settings) ->

    Now = os:system_time(seconds),

    MaxAge = proplists:get_value(truncate_max_age, Settings),

    %% Amount of time to not truncate stats even if they're older than the

    %% maximum age.

    MinTruncationInterval = proplists:get_value(min_truncation_interval,

                                                Settings),

    End = Now - MaxAge,

    %% Each call truncates the little bit that has exceeded the age limit

    %% since the last call.  We might want to do this less frequently e.g.

    %% when a certain time frame is exceeded.

    case End - LastPruningTime > MinTruncationInterval of

        true ->

            do_truncate_stats(LastPruningTime, End, Settings),

            true;

        false ->

            false

    end.

start=<rfc3339 | unix_timestamp>: Start timestamp. Optional and defaults to minimum possible time.