more cleanup of unneeded code, needed to revert cmake standard to get this to work

include/spdlog/details/log_msg_buffer-inl.h

@@ -12,7 +12,6 @@ namespace details {
 
 SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg &orig_msg)
     : log_msg{orig_msg}
-    , attributes{orig_msg.attributes}
 {
     buffer.append(logger_name.data(), logger_name.data() + logger_name.size());
     buffer.append(payload.data(), payload.data() + payload.size());
@@ -21,7 +20,6 @@ SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg &orig_msg)
 
 SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg_buffer &other)
     : log_msg{other}
-    , attributes{other.attributes}
 {
     buffer.append(logger_name.data(), logger_name.data() + logger_name.size());
     buffer.append(payload.data(), payload.data() + payload.size());
@@ -29,7 +27,7 @@ SPDLOG_INLINE log_msg_buffer::log_msg_buffer(const log_msg_buffer &other)
 }
 
 SPDLOG_INLINE log_msg_buffer::log_msg_buffer(log_msg_buffer &&other) SPDLOG_NOEXCEPT 
-    : log_msg{other}, buffer{std::move(other.buffer)}, attributes{std::move(other.attributes)}
+    : log_msg{other}, buffer{std::move(other.buffer)} 
 {
     update_string_views();
 }
@@ -47,7 +45,6 @@ SPDLOG_INLINE log_msg_buffer &log_msg_buffer::operator=(log_msg_buffer &&other)
 {
     log_msg::operator=(other);
     buffer = std::move(other.buffer);
-    attributes = std::move(other.attributes);
     update_string_views();
     return *this;
 }

include/spdlog/details/log_msg_buffer.h

@@ -14,7 +14,6 @@ namespace details {
 class SPDLOG_API log_msg_buffer : public log_msg
 {
     memory_buf_t buffer;
-    std::vector<attr> attributes;
     void update_string_views();
 
 public: