Temporarily remove std::is_nothrow_invocable usage

Author: saki7

include/iris/rvariant/rvariant.hpp

@@ -1073,10 +1073,10 @@ IRIS_RVARIANT_ALWAYS_THROWING_UNREACHABLE_END
         requires (std::three_way_comparable<Ts_> && ...)
     friend constexpr std::common_comparison_category_t<std::compare_three_way_result_t<Ts_>...>
     operator<=>(rvariant<Ts_...> const&, rvariant<Ts_...> const&)
-        noexcept(std::conjunction_v<std::is_nothrow_invocable_r<
+        /*noexcept(std::conjunction_v<std::is_nothrow_invocable_r<
             std::common_comparison_category_t<std::compare_three_way_result_t<Ts_>...>,
             std::compare_three_way, Ts_ const&, Ts_ const&
-        >...>);
+        >...>)*/;
 
     template<class... Ts_>
     friend constexpr rvariant<Ts_...> detail::make_valueless() noexcept;
@@ -1459,10 +1459,10 @@ template<class... Ts>
     requires (std::three_way_comparable<Ts> && ...)
 [[nodiscard]] IRIS_FORCEINLINE constexpr std::common_comparison_category_t<std::compare_three_way_result_t<Ts>...>
 operator<=>(rvariant<Ts...> const& v, rvariant<Ts...> const& w)
-    noexcept(std::conjunction_v<std::is_nothrow_invocable_r<
-        std::common_comparison_category_t<std::compare_three_way_result_t<Ts>...>,
-        std::compare_three_way, Ts const&, Ts const&
-    >...>)
+    //noexcept(std::conjunction_v<std::is_nothrow_invocable_r<
+    //    std::common_comparison_category_t<std::compare_three_way_result_t<Ts>...>,
+    //    std::compare_three_way, Ts const&, Ts const&
+    //>...>)
 {
     auto const vi = detail::valueless_bias<rvariant<Ts...>>(v.index_);
     auto const wi = detail::valueless_bias<rvariant<Ts...>>(w.index_);