Removing leftover cell

Author: AllenDowney

soln/chap10.ipynb

@@ -809,29 +809,6 @@
     "The time it takes to find a key in a dictionary is almost constant -- regardless of the number of items."
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 63,
-   "id": "aa079ed3",
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/plain": [
-       "{'a': 3, 'b': 2}"
-      ]
-     },
-     "execution_count": 63,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "d = {'a': 1, 'b': 2}\n",
-    "d['a'] = 3\n",
-    "d"
-   ]
-  },
   {
    "cell_type": "markdown",
    "id": "b3bfa8a5",