sdbusplus: replace message::variant with std::variant

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I198dd221224a129d82c766aabf6e8e136424e7c8
diff --git a/kcsbridged.cpp b/kcsbridged.cpp
index 2110f3e..38911fa 100644
--- a/kcsbridged.cpp
+++ b/kcsbridged.cpp
@@ -171,7 +171,7 @@
         // copy out payload
         std::vector<uint8_t> data(rawIter, rawEnd);
         // non-session bridges still need to pass an empty options map
-        std::map<std::string, sdbusplus::message::variant<int>> options;
+        std::map<std::string, std::variant<int>> options;
         // the response is a tuple because dbus can only return a single value
         using IpmiDbusRspType = std::tuple<uint8_t, uint8_t, uint8_t, uint8_t,
                                            std::vector<uint8_t>>;