Fix unused parameters and variables

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@290459 91177308-0d34-0410-b5e6-96231b3b80d8

include/optional

diff --git a/include/optional b/include/optional
index c64aa8f..735ef47 100644
--- a/include/optional
+++ b/include/optional
@@ -1080,7 +1080,7 @@
 template <class _Tp>
 _LIBCPP_INLINE_VISIBILITY constexpr
 bool
-operator<=(nullopt_t, const optional<_Tp>& __x) noexcept
+operator<=(nullopt_t, const optional<_Tp>&) noexcept
 {
     return true;
 }
@@ -1096,7 +1096,7 @@
 template <class _Tp>
 _LIBCPP_INLINE_VISIBILITY constexpr
 bool
-operator>(nullopt_t, const optional<_Tp>& __x) noexcept
+operator>(nullopt_t, const optional<_Tp>&) noexcept
 {
     return false;
 }