Fix comment

include/spdlog/source_loc.h

@@ -4,9 +4,7 @@
 #pragma once
 #include <cstdint>
 
-namespace spdlog {
+namespace spdlog {// source location
-// source location - either initiated from std::source_location or from
-// std::experimental::source_location or empty
 struct source_loc {
     constexpr source_loc() = default;
     constexpr source_loc(const char *filename_in, std::uint_least32_t line_in, const char *funcname_in)