EditorManager: Remove outdated TODO

Change-Id: I8c4632985ba9ec9bc2a4efa3754d50035e6b29d3
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/coreplugin/editormanager/editormanager.cpp

@@ -2268,7 +2268,6 @@ void EditorManagerPrivate::vcsOpenCurrentEditor()
         return;
 
     if (!versionControl->vcsOpen(document->filePath())) {
-        // TODO: wrong dialog parent
         QMessageBox::warning(ICore::dialogParent(), tr("Cannot Open File"),
                              tr("Cannot open the file for editing with VCS."));
     }