diff --git a/include/boost/system/detail/generic_category_impl.hpp b/include/boost/system/detail/generic_category_impl.hpp
deleted file mode 100644
index 17bec40..0000000
--- a/include/boost/system/detail/generic_category_impl.hpp
+++ /dev/null
@@ -1,25 +0,0 @@
-// Implementation details of generic_error_category
-//
-// Copyright 2018 Peter Dimov
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-// See library home page at http://www.boost.org/libs/system
-
-#include <cstring>
-
-namespace boost
-{
-
-namespace system
-{
-
-namespace detail
-{
-
-} // namespace detail
-
-} // namespace system
-
-} // namespace boost