Swift: Fix unavailability checks after 6.2 upgrade

Author: jketema

swift/extractor/SwiftExtractor.cpp

@@ -170,7 +170,9 @@ static std::unordered_set<swift::ModuleDecl*> extractDeclarations(
                        bodyEmissionStrategy);
   auto topLevelDecls = getTopLevelDecls(module, primaryFile, lazyDeclaration);
   for (auto decl : topLevelDecls) {
-    // TODO: Swift 6.2 is unavailable
+    if (decl->isUnavailable()) {
+      continue;
+    }
     visitor.extract(decl);
   }
   for (auto& comment : comments) {

swift/extractor/translators/DeclTranslator.cpp

@@ -292,7 +292,9 @@ void DeclTranslator::fillTypeDecl(const swift::TypeDecl& decl, codeql::TypeDecl&
 void DeclTranslator::fillIterableDeclContext(const swift::IterableDeclContext& decl,
                                              codeql::Decl& entry) {
   for (auto member : decl.getMembers()) {
-    // TODO: Swift 6.2 unavailable members
+    if (member->isUnavailable()) {
+      continue;
+    }
     entry.members.emplace_back(dispatcher.fetchLabel(member));
   }
 }