Apply suggestion from @Zingam

Zingam · web-flow · commit a7134489e6a1 · 2025-11-14T13:30:42.000+02:00
diff --git a/libcxx/test/libcxx/utilities/smartptr/nodiscard.verify.cpp b/libcxx/test/libcxx/utilities/smartptr/nodiscard.verify.cpp
@@ -6,6 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
+UNSUPPORTED: c++03
 // <memory>
 
 // Check that functions are marked [[nodiscard]]
