diff --git a/src/updatecheckdialog.h b/src/updatecheckdialog.h
deleted file mode 100644
--- a/src/updatecheckdialog.h
+++ /dev/null
@@ -1,54 +0,0 @@
-/*
-  Copyright © 2017 Hasan Yavuz Özderya
-
-  This file is part of serialplot.
-
-  serialplot is free software: you can redistribute it and/or modify
-  it under the terms of the GNU General Public License as published by
-  the Free Software Foundation, either version 3 of the License, or
-  (at your option) any later version.
-
-  serialplot is distributed in the hope that it will be useful,
-  but WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-  GNU General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with serialplot.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#ifndef UPDATECHECKDIALOG_H
-#define UPDATECHECKDIALOG_H
-
-#include <QDialog>
-#include <QDate>
-#include <QSettings>
-#include "updatechecker.h"
-
-namespace Ui {
-class UpdateCheckDialog;
-}
-
-class UpdateCheckDialog : public QDialog
-{
-    Q_OBJECT
-
-public:
-    explicit UpdateCheckDialog(QWidget *parent = 0);
-    ~UpdateCheckDialog();
-
-    /// Stores update settings into a `QSettings`.
-    void saveSettings(QSettings* settings);
-    /// Loads update settings from a `QSettings`.
-    void loadSettings(QSettings* settings);
-
-private:
-    Ui::UpdateCheckDialog *ui;
-    UpdateChecker updateChecker;
-    QDate lastCheck;
-
-    void showEvent(QShowEvent *event);
-    void closeEvent(QShowEvent *event);
-};
-
-#endif // UPDATECHECKDIALOG_H