fix: Remove broken ipynb header stuff

Author: MoenMi

src/python/chronam.ipynb

@@ -1,16 +1,5 @@
 {
  "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "---\n",
-    "title: Chronicling America API in Python\n",
-    "description: Tutorial for using the Chronicling America API with Python including use cases\n",
-    "\"og:type\": article\n",
-    "---"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {