diff --git a/customcheckablebutton.cpp b/customcheckablebutton.cpp
deleted file mode 100644
--- a/customcheckablebutton.cpp
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
-  Copyright © 2015 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/>.
-*/
-
-#include "customcheckablebutton.h"
-
-CustomCheckableButton::CustomCheckableButton(QWidget *parent) :
-    QPushButton(parent)
-{
-    this->setCheckable(true);
-}
-
-void CustomCheckableButton::nextCheckState()
-{
-    /* Do nothing! Check state will be altered by parent. */
-}