def remove_data_from_combo(self, data):
        combo = self.ui.displayDataCombo
        pos = combo.findText(data.label)
        if pos >= 0:
            combo.removeItem(pos)
Check that a submitted comment isn't a duplicate. This might be caused
dataset/ETHPy150Open glue-viz/glue/glue/viewers/image/qt/viewer_widget.py/ImageWidgetBase.remove_data_from_combo--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/contrib/comments/forms.py/CommentDetailsForm.check_for_duplicate_comment