Minecraft exploring post: remove broken cell

The cell where I try to inline list the zhouwei_rainbow.py wasn't working, so
I've removed it from the post.

posts/2018/minecraft-python-3.ipynb

@@ -122,23 +122,6 @@
     " * It has a bug where it clears all the blocks under it to AIR which breaks anything that you have underneath the rainbow:"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": 6,
-   "metadata": {},
-   "outputs": [
-    {
-     "name": "stderr",
-     "output_type": "stream",
-     "text": [
-      "ERROR:root:Cell magic `%%print` not found.\n"
-     ]
-    }
-   ],
-   "source": [
-    "%%print /Users/mjl/fun/minecraft/mcpipy/zhuowei_rainbow.py"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},
@@ -455,7 +438,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.0"
+   "version": "3.6.4"
   }
  },
  "nbformat": 4,