remove deprecated setWindowToPreview methods

private/tooltip.cpp

@@ -308,18 +308,11 @@ void ToolTip::setContent(QObject *tipper, const ToolTipContent &data)
     d->text->setContent(data);
     d->imageLabel->setPixmap(data.image());
 
-    if (data.highlightWindows() && (data.windowsToPreview().size() > 1 || data.windowToPreview() != 0)) {
+    if (data.highlightWindows() && !data.windowsToPreview().isEmpty()) {
         WindowEffects::highlightWindows(winId(), QList<WId>() << winId() << data.windowsToPreview());
     }
 
-    if (data.windowsToPreview().size() > 1) {
-        d->preview->setWindowIds(data.windowsToPreview());
-    } else {
-        QList<WId>ids;
-        ids.append(data.windowToPreview());
-        d->preview->setWindowIds(ids);
-    }
-
+    d->preview->setWindowIds(data.windowsToPreview());
     d->preview->setHighlightWindows(data.highlightWindows());
 
     d->autohide = data.autohide();

tooltipcontent.cpp

@@ -157,21 +157,6 @@ QPixmap ToolTipContent::image() const
     return d->image;
 }
 
-void ToolTipContent::setWindowToPreview(WId id)
-{
-    d->windowsToPreview.clear();
-    d->windowsToPreview.append(id);
-}
-
-WId ToolTipContent::windowToPreview() const
-{
-    if (d->windowsToPreview.size() == 1) {
-        return d->windowsToPreview.first();
-    } else {
-        return 0;
-    }
-}
-
 void ToolTipContent::setWindowsToPreview(const QList<WId> & ids)
 {
     d->windowsToPreview = ids;

tooltipcontent.h

@@ -117,20 +117,6 @@ public:
      */
     QPixmap image() const;
 
-    /**
-     * Sets the ID of the window to show a preview for.
-     * @deprecated
-     * @see setWindowsToPreview
-     */
-    void setWindowToPreview(WId id);
-
-    /**
-     * Id of a window if you want to show a preview
-     * @deprecated
-     * @see windowsToPreview
-     */
-    WId windowToPreview() const;
-
     /**
      * Sets the IDS of the windows to show a preview for
      * @since 4.3