Remove unused QThreadPoolPrivate::startFrontRunnable().

Change-Id: Ie079aea3412a53cf9dccaa770fa64ff5b6b7b3b1
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>

src/corelib/thread/qthreadpool.cpp

@@ -307,31 +307,6 @@ bool QThreadPoolPrivate::waitForDone(int msecs)
     return queue.isEmpty() && activeThreads == 0;
 }
 
-/*! \internal
-    Pulls a runnable from the front queue and runs it in the current thread. Blocks
-    until the runnable has completed. Returns true if a runnable was found.
-*/
-bool QThreadPoolPrivate::startFrontRunnable()
-{
-    QMutexLocker locker(&mutex);
-    if (queue.isEmpty())
-        return false;
-
-    QRunnable *runnable = queue.takeFirst().first;
-    const bool autoDelete = runnable->autoDelete();
-    bool del = autoDelete && !--runnable->ref;
-
-    locker.unlock();
-    runnable->run();
-    locker.relock();
-
-    if (del) {
-        delete runnable;
-    }
-
-    return true;
-}
-
 /*! \internal
     Seaches for \a runnable in the queue, removes it from the queue and
     runs it if found. This functon does not return until the runnable

src/corelib/thread/qthreadpool_p.h

@@ -83,7 +83,6 @@ public:
     void startThread(QRunnable *runnable = 0);
     void reset();
     bool waitForDone(int msecs = -1);
-    bool startFrontRunnable();
     void stealRunnable(QRunnable *);
 
     mutable QMutex mutex;