removed redundant intialization

include/spdlog/common.h

@@ -262,9 +262,6 @@ struct file_event_handlers
     std::function<void(const filename_t &filename, std::FILE *file_stream)> after_open;
     std::function<void(const filename_t &filename, std::FILE *file_stream)> before_close;
     std::function<void(const filename_t &filename)> after_close;
-
-    file_event_handlers(): before_open(nullptr), after_open(nullptr), before_close(nullptr), after_close(nullptr)
-    {}
 };
 
 namespace details {