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/pythoneditor/pythoneditor.cpp

@@ -53,10 +53,7 @@ PythonEditor::PythonEditor(EditorWidget *editorWidget)
     setContext(Core::Context(Constants::C_PYTHONEDITOR_ID,
                              TextEditor::Constants::C_TEXTEDITOR));
     setDuplicateSupported(true);
-}
-
-PythonEditor::~PythonEditor()
-{
+    setCommentStyle(Utils::CommentDefinition::HashStyle);
 }
 
 Core::IEditor *PythonEditor::duplicate()