Update demo presentation notebook

Author: kushalbakshi

notebooks/demo_run.ipynb

@@ -47,39 +47,6 @@
     "dj.Diagram(subject.Subject) + dj.Diagram(session.Session) + dj.Diagram(probe) + dj.Diagram(ephys)"
    ]
   },
-  {
-   "attachments": {},
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "### Insert an entry in a manual table by calling the `insert()` method\n",
-    "\n",
-    "```python\n",
-    "subject.Subject.insert1(\n",
-    "    dict(subject='subject1',\n",
-    "         subject_birth_date='2023-01-01',\n",
-    "         sex='U',\n",
-    "    )\n",
-    ")\n",
-    "```"
-   ]
-  },
-  {
-   "attachments": {},
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "### Automatically process data with the `populate()` method\n",
-    "\n",
-    "+ Once data is inserted into manual tables, the `populate()` function automatically runs the ingestion and processing routines. \n",
-    "\n",
-    "+ For example, to run Kilosort processing in the `Clustering` table:\n",
-    "\n",
-    "     ```python\n",
-    "     ephys.Clustering.populate()\n",
-    "     ```"
-   ]
-  },
   {
    "attachments": {},
    "cell_type": "markdown",