diff --git a/src/gui/doc/snippets/matrix/matrix.cpp b/src/gui/doc/snippets/matrix/matrix.cpp
deleted file mode 100644
index 115dc3d5083..00000000000
--- a/src/gui/doc/snippets/matrix/matrix.cpp
+++ /dev/null
@@ -1,150 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2016 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the documentation of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:BSD$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** BSD License Usage
-** Alternatively, you may use this file under the terms of the BSD license
-** as follows:
-**
-** "Redistribution and use in source and binary forms, with or without
-** modification, are permitted provided that the following conditions are
-** met:
-**   * Redistributions of source code must retain the above copyright
-**     notice, this list of conditions and the following disclaimer.
-**   * Redistributions in binary form must reproduce the above copyright
-**     notice, this list of conditions and the following disclaimer in
-**     the documentation and/or other materials provided with the
-**     distribution.
-**   * Neither the name of The Qt Company Ltd nor the names of its
-**     contributors may be used to endorse or promote products derived
-**     from this software without specific prior written permission.
-**
-**
-** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#include <QtGui>
-#include <cmath>
-
-class SimpleTransformation : public QWidget
-{
-    void paintEvent(QPaintEvent *) override;
-};
-
-//! [0]
-void SimpleTransformation::paintEvent(QPaintEvent *)
-{
-    QPainter painter(this);
-    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
-    painter.drawRect(0, 0, 100, 100);
-
-    painter.rotate(45);
-
-    painter.setFont(QFont("Helvetica", 24));
-    painter.setPen(QPen(Qt::black, 1));
-    painter.drawText(20, 10, "QMatrix");
-}
-//! [0]
-
-class CombinedTransformation : public QWidget
-{
-    void paintEvent(QPaintEvent *) override;
-};
-
-//! [1]
-void CombinedTransformation::paintEvent(QPaintEvent *)
-{
-    QPainter painter(this);
-    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
-    painter.drawRect(0, 0, 100, 100);
-
-    QMatrix matrix;
-    matrix.translate(50, 50);
-    matrix.rotate(45);
-    matrix.scale(0.5, 1.0);
-    painter.setMatrix(matrix);
-
-    painter.setFont(QFont("Helvetica", 24));
-    painter.setPen(QPen(Qt::black, 1));
-    painter.drawText(20, 10, "QMatrix");
-}
-//! [1]
-
-class BasicOperations : public QWidget
-{
-    void paintEvent(QPaintEvent *) override;
-};
-
-//! [2]
-void BasicOperations::paintEvent(QPaintEvent *)
-{
-    double pi = 3.14;
-
-    double a    = pi/180 * 45.0;
-    double sina = sin(a);
-    double cosa = cos(a);
-
-    QMatrix translationMatrix(1, 0, 0, 1, 50.0, 50.0);
-    QMatrix rotationMatrix(cosa, sina, -sina, cosa, 0, 0);
-    QMatrix scalingMatrix(0.5, 0, 0, 1.0, 0, 0);
-
-    QMatrix matrix;
-    matrix =  scalingMatrix * rotationMatrix * translationMatrix;
-
-    QPainter painter(this);
-    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
-    painter.drawRect(0, 0, 100, 100);
-
-    painter.setMatrix(matrix);
-
-    painter.setFont(QFont("Helvetica", 24));
-    painter.setPen(QPen(Qt::black, 1));
-    painter.drawText(20, 10, "QMatrix");
-}
-//! [2]
-
-int main(int argc, char **argv)
-{
-    QApplication app(argc, argv);
-
-    QWidget widget;
-
-    SimpleTransformation *simpleWidget = new SimpleTransformation;
-    CombinedTransformation *combinedWidget = new CombinedTransformation;
-    BasicOperations *basicWidget = new BasicOperations;
-
-    QVBoxLayout *layout = new QVBoxLayout;
-    layout->addWidget(simpleWidget);
-    layout->addWidget(combinedWidget);
-    layout->addWidget(basicWidget);
-    widget.setLayout(layout);
-
-    widget.show();
-    widget.resize(130, 350);
-    return app.exec();
-}