remove placeholder notebook type for explicit type
remove placeholder notebook type for explicit type

jdetle/nteract,nteract/nteract,jdetle/nteract,jdfreder/nteract,nteract/nteract,rgbkrk/nteract,nteract/nteract,jdfreder/nteract,jdetle/nteract,nteract/nteract,nteract/composition,rgbkrk/nteract,nteract/composition,rgbkrk/nteract,captainsafia/nteract,nteract/nteract,captainsafia/nteract,jdfreder/nteract,captainsafia/nteract,jdetle/nteract,captainsafia/nteract,rgbkrk/nteract,jdfreder/nteract,rgbkrk/nteract,nteract/composition