LibJS: Convert Intl.DisplayNames functions to ThrowCompletionOr

Author: https://github.com/linusg
Commit: 15eadcf023
Pull-request: https://github.com/SerenityOS/serenity/pull/10583
Reviewed-by: https://github.com/IdanHo ✅

Userland/Libraries/LibJS/Runtime/Intl/DisplayNamesConstructor.h

@@ -24,7 +24,7 @@ public:
 private:
     virtual bool has_constructor() const override { return true; }
 
-    JS_DECLARE_OLD_NATIVE_FUNCTION(supported_locales_of);
+    JS_DECLARE_NATIVE_FUNCTION(supported_locales_of);
 };
 
 }