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diff --git a/src/ceph/src/common/backport14.h b/src/ceph/src/common/backport14.h
deleted file mode 100644
index 3e6505d..0000000
--- a/src/ceph/src/common/backport14.h
+++ /dev/null
@@ -1,128 +0,0 @@
-// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
-// vim: ts=8 sw=2 smarttab
-/*
- * Ceph - scalable distributed file system
- *
- * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
- *
- * This is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License version 2.1, as published by the Free Software
- * Foundation.  See file COPYING.
- *
- */
-
-#include <memory>
-#include <type_traits>
-
-#ifndef CEPH_COMMON_BACKPORT14_H
-#define CEPH_COMMON_BACKPORT14_H
-
-// Library code from C++14 that can be implemented in C++11.
-
-namespace ceph {
-template<typename T>
-using remove_extent_t = typename std::remove_extent<T>::type;
-template<typename T>
-using remove_reference_t = typename std::remove_reference<T>::type;
-template<typename T>
-using result_of_t = typename std::result_of<T>::type;
-template<typename T>
-using decay_t = typename std::decay<T>::type;
-
-namespace _backport14 {
-template<typename T>
-struct uniquity {
-  using datum = std::unique_ptr<T>;
-};
-
-template<typename T>
-struct uniquity<T[]> {
-  using array = std::unique_ptr<T[]>;
-};
-
-template<typename T, std::size_t N>
-struct uniquity<T[N]> {
-  using verboten = void;
-};
-
-template<typename T, typename... Args>
-inline typename uniquity<T>::datum make_unique(Args&&... args) {
-  return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
-}
-
-template<typename T>
-inline typename uniquity<T>::array make_unique(std::size_t n) {
-  return std::unique_ptr<T>(new remove_extent_t<T>[n]());
-}
-
-template<typename T, class... Args>
-typename uniquity<T>::verboten
-make_unique(Args&&...) = delete;
-
-// The constexpr variant of std::max().
-template<class T>
-constexpr const T& max(const T& a, const T& b) {
-  return a < b ? b : a;
-}
-} // namespace _backport14
-
-namespace _backport17 {
-template <class C>
-constexpr auto size(const C& c) -> decltype(c.size()) {
-  return c.size();
-}
-
-template <typename T, std::size_t N>
-constexpr std::size_t size(const T (&array)[N]) noexcept {
-  return N;
-}
-
-/// http://en.cppreference.com/w/cpp/utility/functional/not_fn
-// this implementation uses c++14's result_of_t (above) instead of the c++17
-// invoke_result_t, and so may not behave correctly when SFINAE is required
-template <typename F>
-class not_fn_result {
-  using DecayF = decay_t<F>;
-  DecayF fn;
- public:
-  explicit not_fn_result(F&& f) : fn(std::forward<F>(f)) {}
-  not_fn_result(not_fn_result&& f) = default;
-  not_fn_result(const not_fn_result& f) = default;
-
-  template<class... Args>
-  auto operator()(Args&&... args) &
-  -> decltype(!std::declval<result_of_t<DecayF&(Args...)>>()) {
-    return !fn(std::forward<Args>(args)...);
-  }
-  template<class... Args>
-  auto operator()(Args&&... args) const&
-  -> decltype(!std::declval<result_of_t<DecayF const&(Args...)>>()) {
-    return !fn(std::forward<Args>(args)...);
-  }
-
-  template<class... Args>
-  auto operator()(Args&&... args) &&
-  -> decltype(!std::declval<result_of_t<DecayF(Args...)>>()) {
-    return !std::move(fn)(std::forward<Args>(args)...);
-  }
-  template<class... Args>
-  auto operator()(Args&&... args) const&&
-  -> decltype(!std::declval<result_of_t<DecayF const(Args...)>>()) {
-    return !std::move(fn)(std::forward<Args>(args)...);
-  }
-};
-
-template <typename F>
-not_fn_result<F> not_fn(F&& fn) {
-  return not_fn_result<F>(std::forward<F>(fn));
-}
-
-} // namespace _backport17
-using _backport14::make_unique;
-using _backport17::size;
-using _backport14::max;
-using _backport17::not_fn;
-} // namespace ceph
-
-#endif // CEPH_COMMON_BACKPORT14_H