updated test description

Co-authored-by: Nikolas Klauser <[email protected]>

Author: lukasx999

libcxx/test/libcxx/memory/nodiscard.verify.cpp

@@ -6,7 +6,7 @@
 //
 //===----------------------------------------------------------------------===//
 
-// check that functions are marked [[nodiscard]] as an extension in C++17
+// check that functions are marked [[nodiscard]]
 
 // [[nodiscard]] std::make_unique(Args&&...);
 // [[nodiscard]] std::make_unique(size_t);