Don't access static functions/fields via instance

Courtesy of readability-static-accessed-through-instance

Amends: b2a766a79a

Round #2: This time done with Qt Creator's Analyzer, which
found other occurences than run-clang-tidy.py

Change-Id: I479e280c7abcf2d24baccbb0af69ae4bda05198e
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/ios/simulatorcontrol.cpp

@@ -436,7 +436,7 @@ void SimulatorControlPrivate::startSimulator(QFutureInterface<SimulatorControl::
     auto start = chrono::high_resolution_clock::now();
     while (simInfo.isShuttingDown() && !checkForTimeout(start, simulatorStartTimeout)) {
         // Wait till the simulator shuts down, if doing so.
-        QThread::currentThread()->msleep(100);
+        QThread::msleep(100);
         simInfo = deviceInfo(simUdid);
     }