Remove unused evalset variable from cell classification example

examples/cell_classification.ipynb

@@ -58,21 +58,10 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# load train dataset (includes all tissues)\n",
+    "# load cell type dataset (includes all tissues)\n",
     "train_dataset=load_from_disk(\"/path/to/cell_type_train_data.dataset\")"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 17,
-   "id": "60eb8b0b-03ba-4065-98e3-0e424a9174ad",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# load evaluation dataset (includes all tissues)\n",
-    "eval_dataset=load_from_disk(\"/path/to/cell_type_test_data.dataset\")"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,