TextEditor: Centralize settings connections setup

All editors did that manually, with varying approaches. Connect once
when the document is made known to the EditorWidget instead.

Change-Id: Ib0828b08158539859f6f89c8080435a027aa06ed
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/vcsbase/basevcseditorfactory.cpp

@@ -31,7 +31,6 @@
 #include "vcsbaseeditor.h"
 
 #include <texteditor/texteditoractionhandler.h>
-#include <texteditor/texteditorsettings.h>
 
 #include <diffeditor/diffeditorconstants.h>
 
@@ -90,7 +89,6 @@ Core::IEditor *BaseVcsEditorFactory::createEditor()
     if (!mimeTypes().isEmpty())
         vcsEditor->textDocument()->setMimeType(mimeTypes().front());
 
-    TextEditor::TextEditorSettings::initializeEditor(vcsEditor);
     return vcsEditor->editor();
 }