diff --git a/src/Doxybook/Renderer.cpp b/src/Doxybook/Renderer.cpp
index cc43e497f..1e4c05585 100644
--- a/src/Doxybook/Renderer.cpp
+++ b/src/Doxybook/Renderer.cpp
@@ -36,7 +36,7 @@ static std::string trimPath(std::string path) {
 
 static std::string stripTmplSuffix(std::string path) {
     if (path.size() > 4 && path.find(".tmpl") == path.size() - 5) {
-        path.erase(path.size() - 5); 
+        path.erase(path.size() - 5);
     }
     return path;
 }
@@ -103,10 +103,6 @@ Doxybook2::Renderer::Renderer(const Config& config,
         const auto arg = args.at(0)->get<std::string>();
         return Utils::stripNamespace(arg);
     });
-    env->add_callback("extractQualifiedNameFromFunctionDefinition", 1, [](inja::Arguments& args) -> std::string {
-        const auto arg = args.at(0)->get<std::string>();
-        return Utils::extractQualifiedNameFromFunctionDefinition(arg);
-    });
     env->add_callback("split", 2, [](inja::Arguments& args) -> nlohmann::json {
         const auto arg0 = args.at(0)->get<std::string>();
         const auto arg1 = args.at(1)->get<std::string>();
diff --git a/src/Doxybook/Utils.cpp b/src/Doxybook/Utils.cpp
index 8abac9b43..8f0812474 100644
--- a/src/Doxybook/Utils.cpp
+++ b/src/Doxybook/Utils.cpp
@@ -119,18 +119,6 @@ std::string Doxybook2::Utils::stripAnchor(const std::string& str) {
     return ss.str();
 }
 
-static const std::regex FUNCTION_DEFINITION_REGEX(R"(^.* ([a-zA-Z0-9_::+*/%^&|~!=<>()\[\],-]+)$)");
-
-std::string Doxybook2::Utils::extractQualifiedNameFromFunctionDefinition(const std::string& str) {
-    std::smatch matches;
-    if (std::regex_match(str, matches, FUNCTION_DEFINITION_REGEX)) {
-        if (matches.size() == 2) {
-            return matches[1].str();
-        }
-    }
-    return str;
-}
-
 std::string Doxybook2::Utils::escape(std::string str) {
     size_t new_size = 0;
     for (const auto& c : str) {