Remove unused member in QEventLoop auto-test

Change-Id: Icd6a09402c3cf14286f4ba1f8f4c99ac483ec1a3
Reviewed-by: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

tests/auto/corelib/kernel/qeventloop/tst_qeventloop.cpp

@@ -580,7 +580,7 @@ class JobObject : public QObject
 public:
 
     explicit JobObject(QEventLoop *loop, QObject *parent = 0)
-        : QObject(parent), loop(loop), locker(loop)
+        : QObject(parent), locker(loop)
     {
     }
 
@@ -606,7 +606,6 @@ signals:
     void done();
 
 private:
-    QEventLoop *loop;
     QEventLoopLocker locker;
 };