dexonsmith added a comment.

In D97042#2576372 <https://reviews.llvm.org/D97042#2576372>, @dexonsmith wrote:

> Agreed; LGTM.

To be more explicit, here's how I confirmed this is dead code: 
`warn_drv_libstdcxx_not_found` is the only warning in 
`DiagGroup<"stdlibcxx-not-found">` and it's only used by 
clang/lib/Driver/ToolChains/Darwin.cpp. It cannot have an effect on `-cc1`.


Repository:
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  https://reviews.llvm.org/D97042/new/

https://reviews.llvm.org/D97042

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