De-Q_OBJECT-ify various IEditorFactory derived classes

Change-Id: I1470b06d4e10073bb6e4f7ae735f9829fab3bb7b
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/qmljseditor/qmljseditor.h

@@ -142,8 +142,6 @@ public:
 
 class QMLJSEDITOR_EXPORT QmlJSEditorFactory : public TextEditor::TextEditorFactory
 {
-    Q_OBJECT
-
 public:
     QmlJSEditorFactory();
     QmlJSEditorFactory(Core::Id id);