Minor change to PCA for machine learning

Author: mGalarnyk

Sklearn/PCA/PCA_to_Speed-up_Machine_Learning_Algorithms.ipynb

@@ -542,14 +542,6 @@
     "score = logisticRegr.score(test_img, test_lbl)\n",
     "print(score)"
    ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "If you are curious about why accuracy is not a great metric (link to why accuracy is a bad metric\n",
-    "https://github.com/mGalarnyk/datasciencecoursera/blob/master/Stanford_Machine_Learning/Week6/MachineLearningSystemDesign.md)"
-   ]
   }
  ],
  "metadata": {