CppEditor: Remove unused code

Change-Id: Ife0f6609a55de903f5f90af0dc6b72209e02f5af
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/cppeditor/cppeditoroutline.cpp

@@ -148,21 +148,6 @@ bool CppEditorOutline::isSorted() const
     return m_proxyModel->sortColumn() == 0;
 }
 
-void CppEditorOutline::setSorted(bool sort)
-{
-    if (sort != isSorted()) {
-        if (sort)
-            m_proxyModel->sort(0, Qt::AscendingOrder);
-        else
-            m_proxyModel->sort(-1, Qt::AscendingOrder);
-        {
-            QSignalBlocker blocker(m_sortAction);
-            m_sortAction->setChecked(m_proxyModel->sortColumn() == 0);
-        }
-        updateIndexNow();
-    }
-}
-
 AbstractOverviewModel *CppEditorOutline::model() const
 {
     return m_model.get();

src/plugins/cppeditor/cppeditoroutline.h

@@ -62,7 +62,6 @@ signals:
 
 public slots:
     void updateIndex();
-    void setSorted(bool sort);
 
 private:
     void updateNow();

src/plugins/cppeditor/cppeditorplugin.h

@@ -71,7 +71,6 @@ public:
     static CppFileSettings *fileSettings();
 
 signals:
-    void outlineSortingChanged(bool sort);
     void typeHierarchyRequested();
     void includeHierarchyRequested();
 

src/plugins/cppeditor/cppeditorwidget.cpp

@@ -458,10 +458,6 @@ void CppEditorWidget::finalizeInitialization()
     // function combo box sorting
     d->m_cppEditorOutline = new CppEditorOutline(this);
 
-    // TODO: Nobody emits this signal... Remove?
-    connect(CppEditorPlugin::instance(), &CppEditorPlugin::outlineSortingChanged,
-            outline(), &CppEditorOutline::setSorted);
-
     connect(d->m_cppEditorDocument, &CppEditorDocument::codeWarningsUpdated,
             this, &CppEditorWidget::onCodeWarningsUpdated);
     connect(d->m_cppEditorDocument, &CppEditorDocument::ifdefedOutBlocksUpdated,