[libc++][NFC] Remove unused helper function in the test suite

diff --git a/libcxx/test/support/test_range.h b/libcxx/test/support/test_range.h
index 11fecf1..a9b8862 100644 (file)
--- a/libcxx/test/support/test_range.h
+++ b/libcxx/test/support/test_range.h
@@ -62,10 +62,4 @@ struct test_view : std::ranges::view_base {
   sentinel end() const;
 };
 
-template<template<class...> class I, class R>
-constexpr auto make_archetype_range(R&& r) {
-  return std::ranges::subrange(I(std::ranges::begin(r)), sentinel_wrapper(std::ranges::end(r)));
-}
-
-
 #endif // LIBCXX_TEST_SUPPORT_TEST_RANGE_H