Frontend: Revert the behavior introduced by #41940.

Resolves rdar://91382164.

Author: tshortli

lib/Frontend/CompilerInvocation.cpp

@@ -795,10 +795,13 @@ static bool ParseLangArgs(LangOptions &Opts, ArgList &Args,
   // First, set up default minimum inlining target versions.
   auto getDefaultMinimumInliningTargetVersion =
       [&](const llvm::Triple &triple) -> llvm::VersionTuple {
+    // FIXME: Re-enable with rdar://91387029
+#if SWIFT_DEFAULT_API_TARGET_MIN_INLINING_VERSION_TO_MIN
     // In API modules, default to the version when Swift first became available.
     if (Opts.LibraryLevel == LibraryLevel::API)
       if (auto minTriple = minimumAvailableOSVersionForTriple(triple))
         return *minTriple;
+#endif
 
     // In other modules, assume that availability is used less consistently
     // and that library clients will generally raise deployment targets as the

test/attr/attr_inlinable_available.swift

@@ -16,8 +16,9 @@
 // RUN: %target-typecheck-verify-swift -swift-version 5 -enable-library-evolution -target %target-next-stable-abi-triple -target-min-inlining-version min
 
 
+// FIXME: Re-enable with rdar://91387029
 // Check that `-library-level api` implies `-target-min-inlining-version min`
-// RUN: %target-typecheck-verify-swift -swift-version 5 -enable-library-evolution -target %target-next-stable-abi-triple -library-level api
+// RUN/: %target-typecheck-verify-swift -swift-version 5 -enable-library-evolution -target %target-next-stable-abi-triple -library-level api
 
 
 // Check that these rules are only applied when requested and that at least some