sdbusplus: remove deprecated variant_ns

Change-Id: I96964f562c505979ad3a5c6a919c8094ba219da9
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/src/processing.cpp b/src/processing.cpp
index f3f59a9..b0c73b3 100644
--- a/src/processing.cpp
+++ b/src/processing.cpp
@@ -127,8 +127,7 @@
                 continue;
             }
             std::vector<Association> associations =
-                sdbusplus::message::variant_ns::get<std::vector<Association>>(
-                    *variantAssociations);
+                std::get<std::vector<Association>>(*variantAssociations);
             associationChanged(server, associations, objPath.str, wellKnown,
                                interfaceMap, assocMaps);
         }