Remove from __future__ imports as we move away from Python 2

work_in_progress/extra_autodiff.ipynb

@@ -21,23 +21,6 @@
     "# Setup"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "First, let's make sure this notebook works well in both python 2 and 3:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# To support both python 2 and python 3\n",
-    "from __future__ import absolute_import, division, print_function, unicode_literals"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},

work_in_progress/extra_capsnets-cn.ipynb

@@ -68,22 +68,6 @@
     "# Imports"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "同时支持 Python 2 和 Python 3："
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 78,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from __future__ import division, print_function, unicode_literals"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},

work_in_progress/extra_capsnets.ipynb

@@ -68,22 +68,6 @@
     "# Imports"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "To support both Python 2 and Python 3:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from __future__ import division, print_function, unicode_literals"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},

work_in_progress/extra_tensorflow_reproducibility.ipynb

@@ -13,8 +13,6 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "from __future__ import division, print_function, unicode_literals\n",
-    "\n",
     "import numpy as np\n",
     "import tensorflow as tf\n",
     "from tensorflow import keras"