Stop using swift-sdks

Author: kubamracek

utils/build-presets.ini

@@ -2396,7 +2396,6 @@ mixin-preset=
     mixin_stdlib_minimal
 
 stdlib-deployment-targets=freestanding-x86_64
-swift_sdks=FREESTANDING
 swift-primary-variant-sdk=FREESTANDING
 swift-primary-variant-arch=x86_64
 swift-freestanding-sdk=macosx

utils/build-script-impl

@@ -223,7 +223,6 @@ KNOWN_SETTINGS=(
     report-statistics                             "0"               "set to 1 to generate compilation statistics files for swift libraries"
     sil-verify-all                                "0"               "If enabled, run the SIL verifier after each transform when building Swift files during this build process"
     stdlib-deployment-targets                     ""                "space-separated list of targets to configure the Swift standard library to be compiled or cross-compiled for"
-    swift-sdks                                    ""                "space-separated list of SDKs to build, or empty to auto-detect which SDKs are available"
 
     ## FREESTANDING Stdlib Options
     swift-freestanding-sdk                      ""                "which SDK to use when building the FREESTANDING stdlib"