remove old serialization support for UDQDefine

tests/test_ParallelRestart.cpp

@@ -1685,7 +1685,7 @@ BOOST_AUTO_TEST_CASE(UDQDefine)
                        "test", 1.0, {"test1", "test2"}, n0, n0);
     Opm::UDQDefine val1("test", std::make_shared<Opm::UDQASTNode>(n1),
                         Opm::UDQVarType::NONE, "test2");
-    auto val2 = PackUnpack(val1);
+    auto val2 = PackUnpack2(val1);
     DO_CHECKS(UDQDefine)
 #endif
 }