TextEditors: Avoid multiple highlighting runs when changing font setting

And remove some unnecessary code in Python editor

Change-Id: I86cde74c244a16d1b36b0ac0e841ef8110ba832f
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/pythoneditor/pythoneditorwidget.cpp

@@ -85,20 +85,6 @@ void EditorWidget::unCommentSelection()
     Utils::unCommentSelection(this, m_commentDefinition);
 }
 
-/**
-  Handles common IDE fonts&colors settings
-  (Tools -> Options -> Text editor -> Fonts and colors)
-  */
-void EditorWidget::applyFontSettings()
-{
-    TextEditor::BaseTextEditorWidget::applyFontSettings();
-
-    PythonHighlighter *highlighter =
-            qobject_cast<PythonHighlighter *>(baseTextDocument()->syntaxHighlighter());
-    if (highlighter)
-        highlighter->setFontSettings(baseTextDocument()->fontSettings());
-}
-
 TextEditor::BaseTextEditor *EditorWidget::createEditor()
 {
     return new PythonEditor(this);

src/plugins/pythoneditor/pythoneditorwidget.h

@@ -48,7 +48,6 @@ public:
     virtual void unCommentSelection();
 
 protected:
-    void applyFontSettings();
     TextEditor::BaseTextEditor *createEditor();
 
 private: