rework errors

Author: jll63

include/boost/openmethod/initialize.hpp

@@ -1334,7 +1334,6 @@ void registry<Policies...>::compiler::print(const method_report& r) const {
 
 template<class Registry>
 auto initialize() {
-    auto x = odr_check<Registry>::count;
     if (odr_check<Registry>::count > 1) {
         // Multiple definitions of default_registry detected.
         // This indicates an ODR violation.

include/boost/openmethod/registry.hpp

@@ -811,6 +811,9 @@ struct use_class_aux;
 
 } // namespace detail
 
+template<class Registry>
+auto initialize();
+
 //! A collection of methods, classes and policies.
 //!
 //! Methods exist in the context of a registry. Any class used as a method or