sdbusplus: remove deprecated variant_ns

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I4c8f4a9e1d18effb21cbbfe784e695832fa4ff4f
diff --git a/manager.cpp b/manager.cpp
index 69639e4..fea526b 100644
--- a/manager.cpp
+++ b/manager.cpp
@@ -136,9 +136,7 @@
 
     for (const auto& p : properties)
     {
-        onPropertyChanged(
-            p.first,
-            sdbusplus::message::variant_ns::get<std::string>(p.second));
+        onPropertyChanged(p.first, std::get<std::string>(p.second));
     }
 
     return 0;
@@ -216,7 +214,7 @@
         if (p.first == HOST_CURRENT_STATE)
         {
             auto state = Host::convertHostStateFromString(
-                sdbusplus::message::variant_ns::get<std::string>(p.second));
+                std::get<std::string>(p.second));
             onHostState(state == Host::HostState::Running);
             break;
         }