Remove unused QObject parent arguments on options pages

In the new plugin setup scheme they are data members of the
plugin pimpl and never use the parent.

Change-Id: I28fe150393e8159064dcfbd113ce0320af50fd58
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/ios/iossettingswidget.cpp

@@ -62,9 +62,8 @@ static void onSimOperation(const SimulatorInfo &simInfo, SimulatorOperationDialo
     dlg->addMessage(simInfo, response, contextStr);
 }
 
-IosSettingsWidget::IosSettingsWidget(QWidget *parent)
-    : QWidget(parent),
-      m_ui(new Ui::IosSettingsWidget),
+IosSettingsWidget::IosSettingsWidget()
+    : m_ui(new Ui::IosSettingsWidget),
       m_simControl(new SimulatorControl(this))
 {
     m_ui->setupUi(this);