[libcxx-commits] [libcxx] [libc++][test][NFC] Remove unused inclusions of `<iostream>` (PR #134776)

[A. Jiang via libcxx-commits]

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@@ -28,7 +28,6 @@
 #include <iterator>
 
 #include "test_macros.h"
-#include <iostream>
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frederick-vs-ja wrote:

Oh, I found that these files use `std::distance`, which is only guaranteed to be available in `<iterator>` and `<ranges>`, although transitively introduced by several headers in libc++.

I think we should either keep includes of `<iterator>` or replace these `std::distance` calls with `operator-`.

https://github.com/llvm/llvm-project/pull/134776