sdbusplus: remove deprecated variant_ns

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I4c8f4a9e1d18effb21cbbfe784e695832fa4ff4f
diff --git a/utils.hpp b/utils.hpp
index 08b10e8..be78f9e 100644
--- a/utils.hpp
+++ b/utils.hpp
@@ -70,7 +70,7 @@
         sdbusplus::message::variant<T> value{};
         auto reply = bus.call(method);
         reply.read(value);
-        return sdbusplus::message::variant_ns::get<T>(value);
+        return std::get<T>(value);
     }
     catch (const sdbusplus::exception::SdBusError& ex)
     {