Remove parent argument from IEditor constructor

Editors are owned by whoever created them via the corresponding editor
factory, usually the EditorManager.

Change-Id: I4432eab1a3a8c38ce1bba6bb10b0f9273695a524
Reviewed-by: hjk <hjk@qt.io>

src/plugins/android/androidmanifesteditor.cpp

@@ -38,7 +38,7 @@ using namespace Android;
 using namespace Internal;
 
 AndroidManifestEditor::AndroidManifestEditor(AndroidManifestEditorWidget *editorWidget)
-    : Core::IEditor(editorWidget), m_toolBar(nullptr)
+    : m_toolBar(nullptr)
 {
     m_toolBar = new QToolBar(editorWidget);
     m_actionGroup = new QActionGroup(this);