Fix warning on launch from QCommandLineParser

This fixes the following warnings when starting kphotoalbum:
QCommandLineParser: already having an option named "h"
QCommandLineParser: already having an option named "help-all"
QCommandLineParser: already having an option named "v"

These options are already added by KAboutData::setupCommandLine().

MainWindow/Options.cpp

-/* Copyright (C) 2016-2019 The KPhotoAlbum Development Team
+/* Copyright (C) 2016-2020 The KPhotoAlbum Development Team
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -132,8 +132,6 @@ bool MainWindow::Options::searchForImagesOnStart() const
 MainWindow::Options::Options()
     : d(new OptionsPrivate)
 {
-    d->parser.addVersionOption();
-    d->parser.addHelpOption();
     d->configFile.setFlags(QCommandLineOption::HiddenFromHelp);
     d->parser.addOptions(
         QList<QCommandLineOption>()

kpa-thumbnailtool/main.cpp

@@ -80,8 +80,6 @@ int main(int argc, char **argv)
 
     // initialize the commandline parser
     QCommandLineParser parser;
-    parser.addHelpOption();
-    parser.addVersionOption();
     parser.addPositionalArgument(QString::fromUtf8("imageDir"), i18nc("@info:shell", "The directory containing the .thumbnail directory."));
     QCommandLineOption infoOption { QString::fromUtf8("info"), i18nc("@info:shell", "Print information about thumbnail cache.") };
     parser.addOption(infoOption);