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`CxxRecordSemanticsKind::ExplicitlyUnsafe` and `CxxRecordSemanticsKind::UnsafePointerMember` were never directly used, and those do not indicate semantics: they indicate safety of the type when used from Swift, which should be handled by another request `IsSafeUseOfCxxDecl` instead of `CxxRecordSemantics`. Having `ExplicitlyUnsafe` and `UnsafePointerMember` as semantics indicators was problematic, for instance, for types that are move-only and store a pointer at the same time. Swift allowed the usage of these types (under the rules for `UnsafePointerMember` types) when move-only types are disabled, and did not apply the move-only attribute on such types when move-only types are enabled. rdar://110644300