get rid of vestigal m_corona now

corona.cpp

@@ -68,7 +68,6 @@ Corona::Corona(QObject *parent)
     kDebug() << "!!{} STARTUP TIME" << QTime().msecsTo(QTime::currentTime()) << "Corona ctor start";
 #endif
     d->init();
-    ToolTipManager::self()->m_corona = this;
     //setViewport(new QGLWidget(QGLFormat(QGL::StencilBuffer | QGL::AlphaChannel)));
 }
 
@@ -452,11 +451,7 @@ QRegion Corona::availableScreenRegion(int id) const
 
 QPoint Corona::popupPosition(const QGraphicsItem *item, const QSize &s, Qt::AlignmentFlag alignment)
 {
-    // TODO: merge both methods (also these in Applet) into one (with optional alignment) when we can break compatibility
-    // TODO: add support for more flags in the future?
-
     const QGraphicsItem *actualItem = item;
-
     const QGraphicsView *v = viewFor(item);
 
     if (!v) {

tooltipmanager.cpp

@@ -119,8 +119,7 @@ ToolTipManager *ToolTipManager::self()
 
 ToolTipManager::ToolTipManager(QObject *parent)
   : QObject(parent),
-    d(new ToolTipManagerPrivate(this)),
-    m_corona(0)
+    d(new ToolTipManagerPrivate(this))
 {
     d->showTimer->setSingleShot(true);
     connect(d->showTimer, SIGNAL(timeout()), SLOT(showToolTip()));

tooltipmanager.h

@@ -205,7 +205,6 @@ private:
     bool eventFilter(QObject *watched, QEvent *event);
 
     ToolTipManagerPrivate *const d;
-    Corona* m_corona;
 
     Q_PRIVATE_SLOT(d, void showToolTip())
     Q_PRIVATE_SLOT(d, void toolTipHovered(bool))