Remove warning

Mission469Solutions.ipynb

@@ -1701,16 +1701,7 @@
    "cell_type": "code",
    "execution_count": 19,
    "metadata": {},
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "/home/bruno/anaconda3/lib/python3.7/site-packages/ipykernel_launcher.py:2: FutureWarning: The pandas.np module is deprecated and will be removed from pandas in a future version. Import numpy directly instead\n",
-      "  \n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "for i in range(relations_most_used.shape[0]):\n",
     "    relations_most_used.iloc[i,i] = pd.np.NaN"