libstdc++: Avoid -Wunused-parameter warning in testsuite helper

libstdc++-v3/ChangeLog:

	* testsuite/util/testsuite_iterators.h (is_customization_point_object):
	Remove parameter name.

diff --git a/libstdc++-v3/testsuite/util/testsuite_iterators.h b/libstdc++-v3/testsuite/util/testsuite_iterators.h
index 55045e48d560b61556ad42ffe98ed0b85b84957d..d296a2cf18c97ca79d2822dc3d9e1c16444945a7 100644 (file)
--- a/libstdc++-v3/testsuite/util/testsuite_iterators.h
+++ b/libstdc++-v3/testsuite/util/testsuite_iterators.h
@@ -916,7 +916,7 @@ namespace __gnu_test
   // Test for basic properties of C++20 16.3.3.6 [customization.point.object].
   template<typename T>
     constexpr bool
-    is_customization_point_object(T& obj) noexcept
+    is_customization_point_object(T&) noexcept
     {
       // A [CPO] is a function object with a literal class type.
       static_assert( std::is_class_v<T> || std::is_union_v<T> );