diff --git a/ProgrammingAssignment_1/model.ipynb b/ProgrammingAssignment_1/model.ipynb
index 8cc5da3eb03ddcdfce0f7bd9950d7e1ba0070e72..dd65eaeef012f65f48065987d331222cfec3b184 100644
--- a/ProgrammingAssignment_1/model.ipynb
+++ b/ProgrammingAssignment_1/model.ipynb
@@ -168,7 +168,6 @@
     "            n_classes x n_classes array confusion matrix\n",
     "    '''\n",
     "    raise NotImplementedError\n",
-    "    result = np.ndarray([n_classes, n_classes])\n",
     "    \n",
     "    \n",
     "    # returns the confusion matrix as numpy.ndarray\n",