[libcxx-commits] [libcxx] [libc++] Revert fstream::read optimizations (PR #168894)

[Jordan Rupprecht via libcxx-commits]

rupprecht wrote:

> Proposing this revert to keep trunk in a more stable state. Assuming CI passes, of course.
> 

ARM tests on buildkite seem to be stuck on lack of available test runners, but everything else on CI is green. This should be safe to land if someone on libc++ can confirm this is OK to revert.

https://github.com/llvm/llvm-project/pull/168894