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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ifeb64ec42f9210b5640754e8a065d954f617ca44
diff --git a/manager.cpp b/manager.cpp
index fea526b..51bd5bf 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -127,7 +127,7 @@
     using Interface = std::string;
     using Property = std::string;
     using Value = std::string;
-    using Properties = std::map<Property, sdbusplus::message::variant<Value>>;
+    using Properties = std::map<Property, std::variant<Value>>;
 
     Interface interface;
     Properties properties;
@@ -201,7 +201,7 @@
     using Interface = std::string;
     using Property = std::string;
     using Value = std::string;
-    using Properties = std::map<Property, sdbusplus::message::variant<Value>>;
+    using Properties = std::map<Property, std::variant<Value>>;
     using Host = sdbusplus::xyz::openbmc_project::State::server::Host;
 
     Interface interface;