[clang] [clang][Darwin] Remove legacy framework search path logic in the frontend (PR #138234)

[Ian Anderson via cfe-commits]

ian-twilightcoder wrote:

> LGTM.
> 
> I would remove the newly added commented `/* static */`

Alright well it's going to bother me that they don't match the other ones, so I'll get rid of them all.

https://github.com/llvm/llvm-project/pull/138234