rbutil: Remove done() signal from Themes Install window.

This shadows a slot from the base class. Since it isn't used simply
remove it.

Change-Id: If2e524141b7ca4ab1083b4b713b2db3a0b25e6a6

rbutil/rbutilqt/themesinstallwindow.cpp

@@ -325,7 +325,6 @@ void ThemesInstallWindow::install()
 {
     if(ui.listThemes->selectedItems().size() == 0) {
         logger->addItem(tr("No themes selected, skipping"), LOGINFO);
-        emit done(false);
         return;
     }
     QStringList themes;

rbutil/rbutilqt/themesinstallwindow.h

@@ -45,9 +45,6 @@ class ThemesInstallWindow : public QDialog
     public slots:
         void accept(void);
 
-    signals:
-        void done(bool);
-
     private:
         Ui::ThemeInstallFrm ui;
         HttpGet *getter;