final updates

Author: ovalle15

examples/annotation_import/video.ipynb

@@ -50,7 +50,6 @@
         "    * Polygons \n",
         "    * Segmentation masks\n",
         "    * Free form text classifications\n",
-        "    * tool nested classification\n",
         "\n",
         "Please note that this list of unsupported annotations only refers to limitations for importing annotations. For example, when using the Labelbox editor, segmentation masks can be created and edited on video assets."
       ],