Remove from __future__ imports as we move away from Python 2

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": {},