Fix nb lint issue

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

Author: yongtang

docs/tutorials/daos.ipynb

@@ -2,15 +2,20 @@
   "cells": [
     {
       "cell_type": "markdown",
-      "metadata": {},
+      "metadata": {
+        "id": "c774b6fdf4b1"
+      },
       "source": [
         "##### Copyright 2022 The TensorFlow IO Authors."
       ]
     },
     {
       "cell_type": "code",
       "execution_count": null,
-      "metadata": {},
+      "metadata": {
+        "cellView": "form",
+        "id": "906e07f6e562"
+      },
       "outputs": [],
       "source": [
         "#@title Licensed under the Apache License, Version 2.0 (the \"License\");\n",
@@ -38,7 +43,9 @@
     },
     {
       "cell_type": "markdown",
-      "metadata": {},
+      "metadata": {
+        "id": "41881aed035d"
+      },
       "source": [
         "<table class=\"tfo-notebook-buttons\" align=\"left\">\n",
         "  <td>\n",
@@ -569,18 +576,6 @@
     "kernelspec": {
       "display_name": "Python 3",
       "name": "python3"
-    },
-    "language_info": {
-      "codemirror_mode": {
-        "name": "ipython",
-        "version": 3
-      },
-      "file_extension": ".py",
-      "mimetype": "text/x-python",
-      "name": "python",
-      "nbconvert_exporter": "python",
-      "pygments_lexer": "ipython3",
-      "version": "3.8.10"
     }
   },
   "nbformat": 4,