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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Id9fa80d92ff215b4bf92ebcac9b78d0b8aceeacc
diff --git a/item_updater.cpp b/item_updater.cpp
index 141150f..4fbd717 100644
--- a/item_updater.cpp
+++ b/item_updater.cpp
@@ -24,10 +24,9 @@
 {
     using SVersion = server::Version;
     using VersionPurpose = SVersion::VersionPurpose;
-    namespace msg = sdbusplus::message;
 
     sdbusplus::message::object_path objPath;
-    std::map<std::string, std::map<std::string, msg::variant<std::string>>>
+    std::map<std::string, std::map<std::string, std::variant<std::string>>>
         interfaces;
     m.read(objPath, interfaces);