[all-commits] [llvm/llvm-project] e46c1d: Revert "[libc++] Implement LWG1203"

[Raphael Isemann via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e46c1def523323eedfad1174fd2fabbece8f40cc
      https://github.com/llvm/llvm-project/commit/e46c1def523323eedfad1174fd2fabbece8f40cc
  Author: Raphael Isemann <teemperor at gmail.com>
  Date:   2020-09-23 (Wed, 23 Sep 2020)

  Changed paths:
    M libcxx/include/istream
    M libcxx/include/ostream
    R libcxx/test/std/input.output/iostream.format/input.streams/istream.rvalue/not_istreamable.verify.cpp
    M libcxx/test/std/input.output/iostream.format/input.streams/istream.rvalue/rvalue.pass.cpp
    A libcxx/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
    R libcxx/test/std/input.output/iostream.format/output.streams/ostream.rvalue/not_ostreamable.verify.cpp
    R libcxx/test/std/input.output/iostream.format/output.streams/ostream.rvalue/rvalue.pass.cpp
    M libcxx/www/cxx2a_status.html

  Log Message:
  -----------
  Revert "[libc++] Implement LWG1203"

This reverts commit fdc41e11f9687a50c97e2a59663bf2d541ff5489. It causes the
libcxx/modules/stds_include.sh.cpp test to fail with:
libcxx/include/ostream:1039:45: error: no template named 'enable_if_t'; did you mean 'enable_if'?
template <class _Stream, class _Tp, class = enable_if_t<

Still investigating what's causing this and reverting in the meantime to get
the bots green again.