Remove the drop=True arg in notebook 3 to match the lib's notebook

Author: mikeknep

nemo/NeMo-Data-Designer/self-hosted-tutorials/getting-started/3-seeding-with-a-dataset.ipynb

@@ -237,14 +237,12 @@
     "    name=\"patient_sampler\",\n",
     "    column_type=\"sampler\",\n",
     "    sampler_type=\"person\",\n",
-    "    drop=True,\n",
     ")\n",
     "\n",
     "config_builder.add_column(\n",
     "    name=\"doctor_sampler\",\n",
     "    column_type=\"sampler\",\n",
     "    sampler_type=\"person\",\n",
-    "    drop=True,\n",
     ")\n",
     "\n",
     "config_builder.add_column(\n",