Remove scipy install from LDA-Introduction (aws#2590)

Author: jkroll-aws

introduction_to_amazon_algorithms/lda_topic_modeling/LDA-Introduction.ipynb

@@ -41,17 +41,6 @@
     "If you would like to know more about these things take a minute to run this notebook and then check out the SageMaker LDA Documentation and the **LDA-Science.ipynb** notebook."
    ]
   },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {
-    "collapsed": true
-   },
-   "outputs": [],
-   "source": [
-    "!conda install -y scipy"
-   ]
-  },
   {
    "cell_type": "code",
    "execution_count": null,