Remove another unneeded qWait

tests/tst_docks.cpp

@@ -3067,7 +3067,6 @@ void TestDocks::tst_addAndReadd()
     // 1. This just tests some crash I got.
     // Make a dock widget float and immediately reattach it
     auto m = createMainWindow();
-    QTest::qWait(10); // the DND state machine needs the event loop to start, otherwise activeState() is nullptr. (for offscreen QPA)
 
     auto dock1 = createDockWidget("dock1", new QPushButton("1"));
     m->addDockWidget(dock1, KDDockWidgets::Location_OnLeft);