Suppress clang warnings in some tests

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@246399 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/experimental/optional/optional.object/optional.object.ctor/rvalue_T.pass.cpp

@@ -6,6 +6,8 @@
 // Source Licenses. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+//
+// UNSUPPORTED: c++98, c++03, c++11
 
 // <optional>
 
@@ -15,8 +17,6 @@
 #include <type_traits>
 #include <cassert>
 
-#if _LIBCPP_STD_VER > 11
-
 using std::experimental::optional;
 
 class X
@@ -41,17 +41,14 @@ public:
 
 class Z
 {
-    int i_;
 public:
-    Z(int i) : i_(i) {}
+    Z(int) {}
     Z(Z&&) {throw 6;}
 };
 
-#endif  // _LIBCPP_STD_VER > 11
 
 int main()
 {
-#if _LIBCPP_STD_VER > 11
     {
         typedef int T;
         constexpr optional<T> opt(T(5));
@@ -106,5 +103,4 @@ int main()
             assert(i == 6);
         }
     }
-#endif  // _LIBCPP_STD_VER > 11
 }