llvm-project

254ef5f5 - [ADT] Remove MutableArrayRef(std::nullopt_t) (NFC) (#150471)

[ADT] Remove MutableArrayRef(std::nullopt_t) (NFC) (#150471) MutableArrayRef(std::nullopt_t) has been deprecated since: commit 9d6cbc3c20923759d9ffdf19b4f0d498f8cf5584 Author: Kazu Hirata <kazu@google.com> Date: Fri Jun 27 11:31:11 2025 -0700 I've never seen a use outside the LLVM project AFAICT, so this patch just removes it ahead of ArrayRef(std::nullopt_t) to prevent backsliding.