Tests.QmlDesigner: remove QSkip for working tests

Change-Id: I85f61ff4b0ff5abcbff4ef766c4ca7706069bdbc
Reviewed-by: Marco Bubke <marco.bubke@digia.com>

tests/auto/qml/qmldesigner/coretests/tst_testcore.cpp

@@ -5773,7 +5773,6 @@ void tst_TestCore::testModelNodeIsAncestorOf()
 
 void tst_TestCore::testModelDefaultProperties()
 {
-    QSKIP("Fix metainfo", SkipAll);
     QScopedPointer<Model> model(createModel("QtQuick.Rectangle"));
     QVERIFY(model.data());