Vcs: Collapse VcsSubmitEditorFactory hierarchy

Same pattern as for VcsSubmitFactory.

Change-Id: I7adb8868a83842c1b6c642db372a3624dd2e879e
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/vcsbase/submiteditorwidget.cpp

@@ -176,8 +176,7 @@ SubmitEditorWidgetPrivate::SubmitEditorWidgetPrivate() :
 {
 }
 
-SubmitEditorWidget::SubmitEditorWidget(QWidget *parent) :
-    QWidget(parent),
+SubmitEditorWidget::SubmitEditorWidget() :
     d(new SubmitEditorWidgetPrivate)
 {
     d->m_ui.setupUi(this);