TextEditor: Re-work comment definition handling

No need for most of the machinery.

Change-Id: I9078174582d83da94c6c7f20282fd3a5f1742911
Reviewed-by: Christian Stenger <christian.stenger@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/qmljseditor/qmljseditor.h

@@ -78,8 +78,6 @@ public:
     QmlJSTextEditorWidget(QmlJSTextEditorWidget *other);
     ~QmlJSTextEditorWidget();
 
-    virtual void unCommentSelection();
-
     QmlJSEditorDocument *qmlJsEditorDocument() const;
 
     QModelIndex outlineModelIndex();