notebook: remove test to run jupyter_dash server

Author: lecontm

notebooks/statistical_and_visual_analysis.ipynb

@@ -955,17 +955,6 @@
     "#### To do so, please run the notebook locally."
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# This check is necessary for the notebooks_tests \n",
-    "if app is not None:\n",
-    "    app.run_server(mode='inline', debug=True)"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},