Deprecate fmt::localtime

Author: vitaut

include/fmt/chrono.h

@@ -574,7 +574,7 @@ inline auto localtime(std::time_t time) -> std::tm {
 #if FMT_USE_LOCAL_TIME
 template <typename Duration,
           FMT_ENABLE_IF(detail::has_current_zone<Duration>())>
-inline auto localtime(std::chrono::local_time<Duration> time) -> std::tm {
+FMT_DEPRECATED inline auto localtime(std::chrono::local_time<Duration> time) -> std::tm {
   using namespace std::chrono;
   using namespace fmt_detail;
   return localtime(detail::to_time_t(current_zone()->to_sys<Duration>(time)));

test/chrono-test.cc

@@ -352,12 +352,6 @@ TEST(chrono_test, system_clock_time_point) {
 
 #if FMT_USE_LOCAL_TIME
 
-TEST(chrono_test, localtime) {
-  auto t = std::time(nullptr);
-  auto tm = *std::localtime(&t);
-  EXPECT_TRUE(equal(tm, fmt::localtime(t)));
-}
-
 template <typename Duration>
 auto strftime_full_local(std::chrono::local_time<Duration> tp) -> std::string {
   auto t = std::chrono::system_clock::to_time_t(