Revert [6.0][ConformanceLookup] Don't allow skipping inherited unavailable conformances in favor of explicit available ones.#75479

Merged

hborla merged 6 commits intoswiftlang:release/6.0from

hborla:6.0-unavailable-sendable-revert

Jul 26, 2024

Commits on Jul 25, 2024

Revert "[NFC][Copyable] Update an expected error to a warning."
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Revert "[Conformance] Always downgrade redundant conformances to marker protocols to"
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Revert "[ProtocolConformance] Compute the correct un-availability for inherited"
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Revert "[ConformanceLookup] Just kidding, the compiler needs to prefer available"
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Revert "[ConformanceLookup] Always prefer unavailable Sendable conformances from the"
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Revert "[ConformanceLookup] Don't allow skipping inherited unavailable conformances"
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