fix: compile error with clang 16

include/proxysql_utils.h

@@ -25,19 +25,12 @@
 #define	ETIME	ETIMEDOUT
 #endif
 
-// #ifdef CXX17
-// template<class...> struct conjunction : std::true_type { };
-// template<class B1> struct std::conjunction<B1> : B1 { };
-// template<class B1, class... Bn>
-// struct std::conjunction<B1, Bn...>
-//     : std::conditional<bool(B1::value), std::conjunction<Bn...>, B1>::type {};
-// #else
 template<class...> struct conjunction : std::true_type { };
 template<class B1> struct conjunction<B1> : B1 { };
 template<class B1, class... Bn>
 struct conjunction<B1, Bn...>
     : std::conditional<bool(B1::value), conjunction<Bn...>, B1>::type {};
-// #endif // CXX17
+
 /**
  * @brief Stores the result of formatting the first parameter with the provided
  *  arguments, into the std::string reference provided in the second parameter.