remove stray debugging code in 0.4.09

Author: jakevdp

Diff for: notebooks/04.09-Text-and-Annotation.ipynb

@@ -302,9 +302,6 @@
    "source": [
     "%matplotlib inline\n",
     "\n",
-    "import warnings\n",
-    "warnings.simplefilter('ignore')\n",
-    "\n",
     "fig, ax = plt.subplots()\n",
     "\n",
     "x = np.linspace(0, 20, 1000)\n",