Remove qDeleteInEventHandler

It's equivalent to delete these days, and has been for a long time,
since 2011 in fact, when the last remnants of QT_JAMBI_BUILD were
removed.

Change-Id: I7703e41c04204844da4ee75fa251b361e0db4ead
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

src/corelib/kernel/qobject.cpp

@@ -1430,7 +1430,7 @@ bool QObject::event(QEvent *e)
         break;
 
     case QEvent::DeferredDelete:
-        qDeleteInEventHandler(this);
+        delete this;
         break;
 
     case QEvent::MetaCall:
@@ -4940,11 +4940,6 @@ QDebug operator<<(QDebug dbg, const QObject *o)
     Synonym for QList<QObject *>.
 */
 
-void qDeleteInEventHandler(QObject *o)
-{
-    delete o;
-}
-
 /*!
     \fn template<typename PointerToMemberFunction> QMetaObject::Connection QObject::connect(const QObject *sender, PointerToMemberFunction signal, const QObject *receiver, PointerToMemberFunction method, Qt::ConnectionType type)
     \overload connect()

src/corelib/kernel/qobject_p.h

@@ -460,8 +460,6 @@ private:
     bool reset;
 };
 
-void Q_CORE_EXPORT qDeleteInEventHandler(QObject *o);
-
 struct QAbstractDynamicMetaObject;
 struct Q_CORE_EXPORT QDynamicMetaObjectData
 {

src/corelib/kernel/qsingleshottimer_p.h

@@ -118,7 +118,7 @@ void QSingleShotTimer::timerEvent(QTimerEvent *)
     // we would like to use delete later here, but it feels like a
     // waste to post a new event to handle this event, so we just unset the flag
     // and explicitly delete...
-    qDeleteInEventHandler(this);
+    delete this;
 }
 
 QT_END_NAMESPACE

src/network/socket/qnativesocketengine.cpp

@@ -948,15 +948,15 @@ void QNativeSocketEngine::close()
     d->peerAddress.clear();
     d->inboundStreamCount = d->outboundStreamCount = 0;
     if (d->readNotifier) {
-        qDeleteInEventHandler(d->readNotifier);
+        delete d->readNotifier;
         d->readNotifier = nullptr;
     }
     if (d->writeNotifier) {
-        qDeleteInEventHandler(d->writeNotifier);
+        delete d->writeNotifier;
         d->writeNotifier = nullptr;
     }
     if (d->exceptNotifier) {
-        qDeleteInEventHandler(d->exceptNotifier);
+        delete d->exceptNotifier;
         d->exceptNotifier = nullptr;
     }
 }

src/widgets/kernel/qwhatsthis.cpp

@@ -97,8 +97,6 @@ QT_BEGIN_NAMESPACE
     \sa QToolTip
 */
 
-Q_CORE_EXPORT void qDeleteInEventHandler(QObject *o);
-
 class QWhatsThat : public QWidget
 {
     Q_OBJECT
@@ -610,7 +608,7 @@ void QWhatsThis::showText(const QPoint &pos, const QString &text, QWidget *w)
 */
 void QWhatsThis::hideText()
 {
-    qDeleteInEventHandler(QWhatsThat::instance);
+    delete QWhatsThat::instance;
 }
 
 /*!

src/widgets/widgets/qstatusbar.cpp

@@ -520,7 +520,7 @@ void QStatusBar::clearMessage()
     if (d->tempItem.isEmpty())
         return;
     if (d->timer) {
-        qDeleteInEventHandler(d->timer);
+        delete d->timer;
         d->timer = nullptr;
     }
     d->tempItem.clear();