[clang] [llvm] Cleanup MC/DC intrinsics for #82448 (PR #95496)

[via llvm-commits]

zmodem wrote:

> Sweep `condbitmap.update`, since it is no longer used.

It's used by Rust: https://github.com/rust-lang/rust/blob/fd7eefc2753e867053a1c567a7b504ae308e3f85/compiler/rustc_llvm/llvm-wrapper/RustWrapper.cpp#L1581

What's the migration path? Could you put something in the release notes for other users hitting this?

https://github.com/llvm/llvm-project/pull/95496