sdbusplus: remove deprecated variant_ns

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I9e4cfb1c3632a3b26f197a0af2e417e9824f7e72
diff --git a/elog_watch.cpp b/elog_watch.cpp
index 5dabdb9..6abc02b 100644
--- a/elog_watch.cpp
+++ b/elog_watch.cpp
@@ -102,8 +102,7 @@
         return;
     }
 
-    auto& data =
-        sdbusplus::message::variant_ns::get<PropertyName>(attr->second);
+    auto& data = std::get<PropertyName>(attr->second);
     if (data.empty())
     {
         // No Message skip