Remove unused code from repo

app/PlotSubWindow.cpp

@@ -1,48 +0,0 @@
-/*    This file is a part of plaYUVer project
- *    Copyright (C) 2014  by Luis Lucas      (luisfrlucas@gmail.com)
- *                           Joao Carreira   (jfmcarreira@gmail.com)
- *
- *    This program 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 2 of the License, or
- *    (at your option) any later version.
- *
- *    This program 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 this program; if not, write to the Free Software Foundation, Inc.,
- *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-/**
- * \file     PlotWindowHandle.cpp
- * \brief    Window to handle plots
- */
-
-#include "PlotWindowHandle.h"
-
-namespace plaYUVer
-{
-
-PlotWindowHandle::PlotWindowHandle( QWidget * parent ) :
-        QMdiSubWindow( parent )
-{
-  setParent( parent );
-
-  setAttribute( Qt::WA_DeleteOnClose );
-  setBackgroundRole( QPalette::Light );
-  setVisible( false );
-
-  m_cPlotArea = new QCustomPlot( this );
-  setWidget( m_cPlotArea );
-}
-
-PlotWindowHandle::~PlotWindowHandle()
-{
-  delete m_cPlotArea;
-}
-
-}  // NAMESPACE