diff --git a/ProgrammingAssignment_1/model.ipynb b/ProgrammingAssignment_1/model.ipynb
index 0bd8990ca785eeef47e09ae3406c1ee97fc6fab7..36ac14dc31575cbea231c2830566cd54a17ac9c9 100644
--- a/ProgrammingAssignment_1/model.ipynb
+++ b/ProgrammingAssignment_1/model.ipynb
@@ -122,12 +122,7 @@
     "    Returns:\n",
     "        dist: float\n",
     "    '''\n",
-    "    if metric == 'Euclidean':\n",
-    "        raise NotImplementedError\n",
-    "    elif metric == 'Manhattan':\n",
-    "        raise NotImplementedError\n",
-    "    else:\n",
-    "        raise ValueError('{} is not a valid metric.'.format(metric))\n",
+
     "    return dist # scalar distance btw x and y"
    ]
   },