[llvm] [ADT] Remove any_isa (NFC) (PR #65636)

[via llvm-commits]

kazutakahirata wrote:

For reference, here are related activities:

- https://reviews.llvm.org/D139974
- #65565

According to @Flakebi:

> std::any is broken until Visual Studio 2022 17.4, so we need to wait until LLVM’s minimum VS version is there. Currently, LLVM supports anything down to VS 2019.


https://github.com/llvm/llvm-project/pull/65636