Removed nested python annotation during label creation

Author: ovalle15

examples/annotation_import/text.ipynb

@@ -586,8 +586,7 @@
         "     named_entitity_annotation, \n",
         "     radio_annotation, \n",
         "     checklist_annotation, \n",
-        "     text_annotation, \n",
-        "     radio_annotation_nested \n",
+        "     text_annotation \n"
         "    ]\n",
         ")\n",
         "\n",