drop nbytes cell

Author: Ray Bell

08_machine_learning.ipynb

@@ -382,15 +382,6 @@
     "X"
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "X.nbytes / 1e9"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -471,7 +462,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.5"
+   "version": "3.7.6"
   },
   "nbsphinx": {
    "execute": "never"