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/qmljseditor/qmljseditingsettingspage.cpp

@@ -123,8 +123,7 @@ void QmlJsEditingSettings::setAutoFormatOnlyCurrentProject(const bool autoFormat
     m_autoFormatOnlyCurrentProject = autoFormatOnlyCurrentProject;
 }
 
-QmlJsEditingSettignsPageWidget::QmlJsEditingSettignsPageWidget(QWidget *parent) :
-    QWidget(parent)
+QmlJsEditingSettignsPageWidget::QmlJsEditingSettignsPageWidget()
 {
     m_ui.setupUi(this);
 }