Remove unused code.

src/plugins/help/centralwidget.cpp

@@ -300,13 +300,6 @@ QString CentralWidget::currentTitle() const
     return QString();
 }
 
-void CentralWidget::copySelection()
-{
-    HelpViewer* viewer = currentHelpViewer();
-    if (viewer)
-        viewer->copy();
-}
-
 void CentralWidget::initPrinter()
 {
 #ifndef QT_NO_PRINTER
@@ -370,11 +363,6 @@ void CentralWidget::pageSetup()
 #endif
 }
 
-bool CentralWidget::isHomeAvailable() const
-{
-    return currentHelpViewer() ? true : false;
-}
-
 void CentralWidget::home()
 {
     HelpViewer* viewer = currentHelpViewer();

src/plugins/help/centralwidget.h

@@ -66,7 +66,6 @@ public:
     bool hasSelection() const;
     QUrl currentSource() const;
     QString currentTitle() const;
-    bool isHomeAvailable() const;
     bool isForwardAvailable() const;
     bool isBackwardAvailable() const;
     QList<QAction*> globalActions() const;
@@ -86,7 +85,6 @@ public slots:
     void nextPage();
     void resetZoom();
     void previousPage();
-    void copySelection();
     void print();
     void pageSetup();
     void printPreview();