Removes unused notebook import
Removes unused notebook import

craigcitro/datalab,craigcitro/datalab,parthea/datalab,googledatalab/datalab,yebrahim/datalab,parthea/datalab,craigcitro/datalab,craigcitro/datalab,yebrahim/datalab,googledatalab/datalab,googledatalab/datalab,yebrahim/datalab,googledatalab/datalab,googledatalab/datalab,craigcitro/datalab,yebrahim/datalab,parthea/datalab,parthea/datalab,yebrahim/datalab,parthea/datalab,googledatalab/datalab,parthea/datalab