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

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I46bdb828379d72e16a95fe1bc3cb578bfdfce80c
diff --git a/occ_pass_through.cpp b/occ_pass_through.cpp
index 9c585d0..cecad37 100644
--- a/occ_pass_through.cpp
+++ b/occ_pass_through.cpp
@@ -139,7 +139,7 @@
 void PassThrough::activeStatusEvent(sdbusplus::message::message& msg)
 {
     std::string statusInterface;
-    std::map<std::string, sdbusplus::message::variant<bool>> msgData;
+    std::map<std::string, std::variant<bool>> msgData;
     msg.read(statusInterface, msgData);
 
     auto propertyMap = msgData.find("OccActive");