Fix typo in tutorial 8.

Author: igorborgest

tutorials/008 - Redshift - Copy & Unload.ipynb

@@ -14,7 +14,7 @@
     "\n",
     "2 - [UNLOAD](https://docs.aws.amazon.com/redshift/latest/dg/r_UNLOAD.html)\n",
     "\n",
-    "Let's take a look and how Wrangler could can use it."
+    "Let's take a look and how Wrangler can use it."
    ]
   },
   {
@@ -781,17 +781,8 @@
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
    "version": "3.6.5"
-  },
-  "pycharm": {
-   "stem_cell": {
-    "cell_type": "raw",
-    "metadata": {
-     "collapsed": false
-    },
-    "source": []
-   }
   }
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}