Replace c10::guts::stuff with std::stuff

[smessmer]

Stack from ghstack:

• Reimplement c10::apply / c10::invoke with c++14 #30924 Reimplement c10::apply / c10::invoke with c++14
• Simplify code with decltype(auto) #30922 Simplify code with decltype(auto)
• if_constexpr for C++14 #31091 if_constexpr for C++14
• Replace c10::guts::stuff with std::stuff #30915 Replace c10::guts::stuff with std::stuff

Since we now have C++14, we don't need these c10::guts helpers anymore

• c10::guts::make_unique -> std::make_unique
• c10::guts::integer_sequence -> std::integer_sequence
• c10::guts::index_sequence -> std::index_sequence
• c10::guts::make_integer_sequence -> std::make_integer_sequence
• c10::guts::make_index_sequence -> std::make_index_sequence
• c10::guts::index_sequence_for -> std::index_sequence_for
• c10::guts::conditional_t -> std::conditional_t
• c10::guts::enable_if_t -> std::enable_if_t
• c10::guts::add_lvalue_reference_t -> std::add_lvalue_reference_t
• c10::guts::remove_reference_t -> std::remove_reference_t
• c10::guts::remove_cv_t -> std::remove_cv_t
• c10::guts::result_of_t -> std::result_of_t
• c10::guts::decay_t -> std::decay_t
• c10::guts::remove_const_t -> std::remove_const_t
• c10::guts::remove_pointer_t -> std::remove_pointer_t
• c10::guts::common_type_t -> std::common_type_t

Differential Revision: D18869639

[ezyang]

As a matter of the pubic record can you list in the PR description all of the functions you converted.;

[kostmo]

CircleCI build failures summary

As of commit 9f8233a:

• 2/2 broken upstream at merge base 409151e (see grid view)
  • You may want to rebase on the viable/strict branch (see its recency history):
    • If your commit is newer than viable/strict, you can try basing on an older, stable commit:

      git fetch viable/strict
      git rebase --onto viable/strict $(git merge-base origin/master HEAD)
      

    • If your commit is older than viable/strict:

      git fetch viable/strict
      git rebase viable/strict
      

• 0/2 failures introduced in this PR

Detailed failure analysis

One may explore the probable reasons each build failed interactively on the Dr. CI website.

2 upstream failures recognized by patterns:

These builds matched patterns, but were probably caused by upstream breakages:

• caffe2_onnx_py2_gcc5_ubuntu16_04_test
• caffe2_onnx_py3_6_clang7_ubuntu16_04_test

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This comment has been revised 3 times.

[facebook-github-bot]

This pull request has been merged in 643ca5d.