[libcxx-commits] [libcxx] [libc++][numeric] Modernized `std::midpoint` (PR #174596)

[Nikolas Klauser via libcxx-commits]

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philnik777 wrote:

While you're at it you can also remove `is_pointer.h` and `remove_pointer.h`.

https://github.com/llvm/llvm-project/pull/174596