Revert 310e4dc6eed83451ab6d28e683a6c7b3c6c790ad
Revert 310e4dc6eed83451ab6d28e683a6c7b3c6c790ad

tempbottle/rust-mysql-simple,alex-gulyas/rust-mysql-simple,wang19742008/rust-mysql-simple,blackbeam/rust-mysql-simple