Removed periodic worker

CMakeLists.txt

@@ -198,7 +198,6 @@ set(SPDLOG_SRCS
 	"src/details/os_filesystem.cpp"
     "src/details/log_msg.cpp"
     "src/details/log_msg_buffer.cpp"
-    "src/details/periodic_worker.cpp"
         "src/details/context.cpp"
     "src/details/thread_pool.cpp"
     "src/sinks/base_sink.cpp"

src/details/periodic_worker.cpp

@@ -1,22 +0,0 @@
-// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
-// Distributed under the MIT License (http://opensource.org/licenses/MIT)
-
-#include "spdlog/details/periodic_worker.h"
-
-namespace spdlog {
-namespace details {
-
-// stop the worker thread and join it
-periodic_worker::~periodic_worker() {
-    if (worker_thread_.joinable()) {
-        {
-            std::lock_guard<std::mutex> lock(mutex_);
-            active_ = false;
-        }
-        cv_.notify_one();
-        worker_thread_.join();
-    }
-}
-
-}  // namespace details
-}  // namespace spdlog