Remove changeEvent(QEvent::LanguageChange) implementation

This was implemented only for a small set of widgets. It's unlikely that
we will ever have or even want a dynamic language selection, until then
this code is only dead freight.

Change-Id: I1bff4e1e89057786c0e5cb57225a508c5d390d9c
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/mercurial/srcdestdialog.h

@@ -45,12 +45,10 @@ class SrcDestDialog : public QDialog
 public:
     SrcDestDialog(QWidget *parent = 0);
     ~SrcDestDialog();
+
     void setPathChooserKind(Utils::PathChooser::Kind kind);
     QString getRepositoryString() const;
 
-protected:
-    void changeEvent(QEvent *e);
-
 private:
     Ui::SrcDestDialog *m_ui;
 };