diff --git a/include/boost/callable_traits/detail/default_callable_traits.hpp b/include/boost/callable_traits/detail/default_callable_traits.hpp
index 8497078..0480b5c 100644
--- a/include/boost/callable_traits/detail/default_callable_traits.hpp
+++ b/include/boost/callable_traits/detail/default_callable_traits.hpp
@@ -151,12 +151,6 @@ struct default_callable_traits {
     template<template<class...> class Container>
     using expand_args = error_t;
 
-    template<template<class...> class Container, typename... RightArgs>
-    using expand_args_left = error_t;
-
-    template<template<class...> class Container, typename... LeftArgs>
-    using expand_args_right = error_t;
-
     using clear_args = error_t;
     
     template<typename... NewArgs>
diff --git a/include/boost/callable_traits/detail/function_object.hpp b/include/boost/callable_traits/detail/function_object.hpp
index d12fc00..25661e5 100644
--- a/include/boost/callable_traits/detail/function_object.hpp
+++ b/include/boost/callable_traits/detail/function_object.hpp
@@ -45,14 +45,6 @@ struct function_object : Base {
     using expand_args = typename function<function_type>::template
         expand_args<Container>;
 
-    template<template<class...> class Container, typename... RightArgs>
-    using expand_args_left = typename function<function_type>::template
-        expand_args_left<Container, RightArgs...>;
-
-    template<template<class...> class Container, typename... LeftArgs>
-    using expand_args_right = typename function<function_type>::template
-        expand_args_right<Container, LeftArgs...>;
-
     template<typename C, typename U = T>
     using apply_member_pointer =
         typename std::remove_reference<U>::type C::*;