[clang] [Sema] Directly use written attributes in ObjC (PR #179703)

[Prajwal Nadig via cfe-commits]

snprajwal wrote:

Nice catch @ahatanak, I've updated the commit to remove the redundant method entirely. Also added a release note (AST handling felt most appropriate, please let me know if there's a better category that this falls under).

https://github.com/llvm/llvm-project/pull/179703