Remove <experimental/optional>; use <optional> instead. See https://libcxx.llvm.org/TS_deprecation.html

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@323971 91177308-0d34-0410-b5e6-96231b3b80d8

test/libcxx/double_include.sh.cpp

@@ -150,7 +150,6 @@
 #include <experimental/map>
 #include <experimental/memory_resource>
 #include <experimental/numeric>
-#include <experimental/optional>
 #include <experimental/propagate_const>
 #include <experimental/ratio>
 #include <experimental/regex>

test/libcxx/experimental/optional/version.pass.cpp

@@ -1,20 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-// <optional>
-
-#include <experimental/optional>
-
-#ifndef _LIBCPP_VERSION
-#error _LIBCPP_VERSION not defined
-#endif
-
-int main()
-{
-}

test/libcxx/min_max_macros.sh.cpp

@@ -261,8 +261,6 @@ TEST_MACROS();
 TEST_MACROS();
 #include <experimental/numeric>
 TEST_MACROS();
-#include <experimental/optional>
-TEST_MACROS();
 #include <experimental/propagate_const>
 TEST_MACROS();
 #include <experimental/ratio>