[clang] [clang][Darwin] Remove legacy framework search path logic in the frontend (PR #120149)

[Louis Dionne via cfe-commits]

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@@ -8265,6 +8265,11 @@ def internal_externc_isystem : Separate<["-"], "internal-externc-isystem">,
            "implicit extern \"C\" semantics; these are assumed to not be "
            "user-provided and are used to model system and standard headers' "
            "paths.">;
+def internal_iframework : Separate<["-"], "internal-iframework">,
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ldionne wrote:

Is it really closer to internal-externc-isystem than internal-isystem though? My understanding is that all of these flags are simply taken (by CC1) in the order in which they appear in the command-line. Is that not what's happening?

https://github.com/llvm/llvm-project/pull/120149