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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Ie60d8442edab9622240cf47840e0d62b8e57a5b4
diff --git a/nvme_manager.cpp b/nvme_manager.cpp
index 023e20e..276eb2d 100644
--- a/nvme_manager.cpp
+++ b/nvme_manager.cpp
@@ -439,8 +439,7 @@
 
 void Nvme::createNVMeInventory()
 {
-    using Properties =
-        std::map<std::string, sdbusplus::message::variant<std::string, bool>>;
+    using Properties = std::map<std::string, std::variant<std::string, bool>>;
     using Interfaces = std::map<std::string, Properties>;
 
     std::string inventoryPath;