message: Silence unused variable 'leaps' warning
diff: @@ -1155,7 +1155,6 @@ to_sys_time(const utc_time<Duration>& ut)
  {
  using namespace std::chrono;
  using duration = typename std::common_type<Duration, seconds>::type;
  - auto const& leaps = get_tzdb().leaps;
  auto ls = is_leap_second(ut);
  auto tp = sys_time<duration>{ut.time_since_epoch() - ls.second};
  if (ls.first)
  @@ -1181,14 +1180,11 @@ to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
  using CT = typename common_type<Duration, seconds>::type;
  const string abbrev("UTC");
  CONSTDATA seconds offset{0};
  - auto const& leaps = get_tzdb().leaps;
  - year_month_day ymd;
  - time_of_day<CT> time;
  auto ls = is_leap_second(t);
  auto tp = sys_time<CT>{t.time_since_epoch() - ls.second};
  auto const sd = floor<days>(tp);
  - ymd = sd;
  - time = make_time(tp - sd);
  + year_month_day ymd = sd;
  + auto time = make_time(tp - sd);
  time.seconds() += seconds{ls.first};
  fields<CT> fds{ymd, time};
  to_stream(os, fmt, fds, &abbrev, &offset);
  