[libc++] Remove c++98 Lit features in the test suite
We don't populate a Lit feature named c++98 since 31cbe0f240f.
GitOrigin-RevId: 183b75f667bb51fd4e4ef5a029dcf41432439920
diff --git a/test/std/concepts/lang/convertible.compile.pass.cpp b/test/std/concepts/lang/convertible.compile.pass.cpp
index 279df1c..c1818de 100644
--- a/test/std/concepts/lang/convertible.compile.pass.cpp
+++ b/test/std/concepts/lang/convertible.compile.pass.cpp
@@ -6,7 +6,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
+// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts
// template<class From, class To>
diff --git a/test/std/re/re.const/re.matchflag/match_multiline.pass.cpp b/test/std/re/re.const/re.matchflag/match_multiline.pass.cpp
index 18ac9da..fbc3d9c 100644
--- a/test/std/re/re.const/re.matchflag/match_multiline.pass.cpp
+++ b/test/std/re/re.const/re.matchflag/match_multiline.pass.cpp
@@ -7,7 +7,7 @@
//
//===----------------------------------------------------------------------===//
-// UNSUPPORTED: c++98, c++03
+// UNSUPPORTED: c++03
// <regex>
