Remove track_grad_norm references

#3190 (comment)

docs/tutorials/multimodal/advanced_topics/customization.ipynb

@@ -360,29 +360,6 @@
     "```\n"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "id": "02d07866",
-   "metadata": {},
-   "source": [
-    "### optimization.track_grad_norm\n",
-    "\n",
-    "Track the p-norm of gradients during training. May be set to ‘inf’ infinity-norm. If using Automatic Mixed Precision (AMP), the gradients will be unscaled before logging them."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "1b60c371",
-   "metadata": {},
-   "source": [
-    "```\n",
-    "# default used by AutoMM (no tracking)\n",
-    "predictor.fit(hyperparameters={\"optimization.track_grad_norm\": -1})\n",
-    "# track the 2-norm\n",
-    "predictor.fit(hyperparameters={\"optimization.track_grad_norm\": 2})\n",
-    "```\n"
-   ]
-  },
   {
    "cell_type": "markdown",
    "id": "abe87d32",
@@ -1574,4 +1551,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 5
-}
+}