[clang] [Clang] Remove unnecessary Decl transform & profiles for SizeOfPackExpr (PR #124533)

[Shafik Yaghmour via cfe-commits]

https://github.com/shafik commented:

In my comment here, it really looks like a clang-17 regression: https://github.com/llvm/llvm-project/issues/124161#event-16079402729

>From what I can tell you also address the simplified version, so I believe a release note is probably warrented.

Are there really multiple bugs here?

https://github.com/llvm/llvm-project/pull/124533