[clang] [clang] Do not diagnose unused deleted operator delete[] (PR #134357)

[Mariya Podchishchaeva via cfe-commits]

Fznamznon wrote:

> LGTM but do we need a release note?

No, it is a regression caused by a patch committed a couple of days ago.

https://github.com/llvm/llvm-project/pull/134357