TextEditor: Remove some *Widget::createEditor implementation

This removes the ones that were not to be used anymore.
The fallback in the base class is left in for now.

Change-Id: I5e7ab16497a83eff9b11deb9e1feb390757eac0e
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/texteditor/snippets/snippeteditor.cpp

@@ -73,9 +73,4 @@ void SnippetEditorWidget::focusOutEvent(QFocusEvent *event)
     BaseTextEditorWidget::focusOutEvent(event);
 }
 
-BaseTextEditor *SnippetEditorWidget::createEditor()
-{
-    QTC_ASSERT("should not happen anymore" && false, return 0);
-}
-
 } // namespace

src/plugins/texteditor/snippets/snippeteditor.h

@@ -49,7 +49,6 @@ protected:
     virtual void focusOutEvent(QFocusEvent *event);
 
     virtual int extraAreaWidth(int * /* markWidthPtr */ = 0) const { return 0; }
-    virtual BaseTextEditor *createEditor();
 };
 
 } // namespace TextEditor