diff --git a/modules/drogon/drogon/lib/inc/drogon/utils/FunctionTraits.h b/modules/drogon/drogon/lib/inc/drogon/utils/FunctionTraits.h
deleted file mode 100644
index fd15524..0000000
--- a/modules/drogon/drogon/lib/inc/drogon/utils/FunctionTraits.h
+++ /dev/null
@@ -1,142 +0,0 @@
-/**
- *
- *  FunctionTraits.h
- *  An Tao
- *
- *  Copyright 2018, An Tao.  All rights reserved.
- *  https://github.com/an-tao/drogon
- *  Use of this source code is governed by a MIT license
- *  that can be found in the License file.
- *
- *  Drogon
- *
- */
-
-#pragma once
-
-#include <functional>
-#include <memory>
-#include <tuple>
-#include <type_traits>
-
-namespace drogon {
-class HttpRequest;
-class HttpResponse;
-using HttpRequestPtr = std::shared_ptr<HttpRequest>;
-using HttpResponsePtr = std::shared_ptr<HttpResponse>;
-
-namespace internal {
-
-
-template <typename T>
-struct resumable_type : std::false_type {
-};
-
-template <typename>
-struct FunctionTraits;
-
-// functor,lambda,std::function...
-template <typename Function>
-struct FunctionTraits : public FunctionTraits<decltype(
-								&std::remove_reference<Function>::type::operator())> {
-	static const bool isClassFunction = false;
-	static const bool isDrObjectClass = false;
-	using class_type = void;
-	static const std::string name() {
-		return std::string("Functor");
-	}
-};
-
-// class instance method of const object
-template <typename ClassType, typename ReturnType, typename... Arguments>
-struct FunctionTraits<ReturnType (ClassType::*)(Arguments...) const>
-		: FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isClassFunction = true;
-	static const bool isDrObjectClass =
-			std::is_base_of<DrObject<ClassType>, ClassType>::value;
-	using class_type = ClassType;
-	static const std::string name() {
-		return std::string("Class Function");
-	}
-};
-
-// class instance method of non-const object
-template <typename ClassType, typename ReturnType, typename... Arguments>
-struct FunctionTraits<ReturnType (ClassType::*)(Arguments...)>
-		: FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isClassFunction = true;
-	static const bool isDrObjectClass =
-			std::is_base_of<DrObject<ClassType>, ClassType>::value;
-	using class_type = ClassType;
-	static const std::string name() {
-		return std::string("Class Function");
-	}
-};
-
-// normal function for HTTP handling
-template <typename ReturnType, typename... Arguments>
-struct FunctionTraits<
-		ReturnType (*)(const HttpRequestPtr &req,
-				std::function<void(const HttpResponsePtr &)> &&callback,
-				Arguments...)> : FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isHTTPFunction = !resumable_type<ReturnType>::value;
-	static const bool isCoroutine = false;
-	using class_type = void;
-	using first_param_type = HttpRequestPtr;
-	using return_type = ReturnType;
-};
-
-template <typename ReturnType, typename... Arguments>
-struct FunctionTraits<
-		ReturnType (*)(HttpRequestPtr &req,
-				std::function<void(const HttpResponsePtr &)> &&callback,
-				Arguments...)> : FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isHTTPFunction = false;
-	using class_type = void;
-};
-
-template <typename ReturnType, typename... Arguments>
-struct FunctionTraits<
-		ReturnType (*)(HttpRequestPtr &&req,
-				std::function<void(const HttpResponsePtr &)> &&callback,
-				Arguments...)> : FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isHTTPFunction = false;
-	using class_type = void;
-};
-
-// normal function for HTTP handling
-template <typename T, typename ReturnType, typename... Arguments>
-struct FunctionTraits<
-		ReturnType (*)(T &&customReq,
-				std::function<void(const HttpResponsePtr &)> &&callback,
-				Arguments...)> : FunctionTraits<ReturnType (*)(Arguments...)> {
-	static const bool isHTTPFunction = !resumable_type<ReturnType>::value;
-	static const bool isCoroutine = false;
-	using class_type = void;
-	using first_param_type = T;
-	using return_type = ReturnType;
-};
-
-// normal function
-template <typename ReturnType, typename... Arguments>
-struct FunctionTraits<ReturnType (*)(Arguments...)> {
-	using result_type = ReturnType;
-
-	template <std::size_t Index>
-	using argument =
-			typename std::tuple_element<Index, std::tuple<Arguments...> >::type;
-
-	static const std::size_t arity = sizeof...(Arguments);
-	using class_type = void;
-	using return_type = ReturnType;
-	static const bool isHTTPFunction = false;
-	static const bool isClassFunction = false;
-	static const bool isDrObjectClass = false;
-	static const bool isCoroutine = false;
-	static const std::string name() {
-		return std::string("Normal or Static Function");
-	}
-};
-
-} // namespace internal
-} // namespace drogon