MainWindow: Further simplification

Looking at this now this can be simplified even further.

src/MainWindow.cpp

@@ -366,17 +366,12 @@ void MainWindow::fileClose()
         closeSqlTab(i, true);
 }
 
-void MainWindow::fileExit()
-{
-    db.close();
-}
-
 void MainWindow::closeEvent( QCloseEvent* event )
 {
+    db.close();
     PreferencesDialog::setSettingsValue("MainWindow", "geometry", saveGeometry());
     PreferencesDialog::setSettingsValue("MainWindow", "windowState", saveState());
     PreferencesDialog::setSettingsValue("SQLLogDock", "Log", ui->comboLogSubmittedBy->currentText());
-    fileExit();
     QMainWindow::closeEvent(event);
 }
 

src/MainWindow.h

@@ -105,7 +105,6 @@ private slots:
     virtual void populateTable(const QString& tablename);
     virtual void resetBrowser();
     virtual void fileClose();
-    virtual void fileExit();
     virtual void addRecord();
     virtual void deleteRecord();
     virtual void selectTableLine( int lineToSelect );