[KeyDistribution_BB84] Remove link to unavailable video (#652)

KeyDistribution_BB84/KeyDistribution_BB84.ipynb

@@ -23,7 +23,6 @@
     "* [QKD summer school lecture on quantum key distribution](https://www.youtube.com/watch?v=oEJOtu0joXk).\n",
     "* [Key Distribution Wikipedia article](https://en.wikipedia.org/wiki/Quantum_key_distribution).\n",
     "* [BB84 protocol Wikipedia article](https://en.wikipedia.org/wiki/BB84).\n",
-    "* [Short animated video introducing BB84 protocol](https://www.youtube.com/watch?v=UVzRbU6y7Ks).\n",
     "* [Updated version of the BB84 paper](https://www.sciencedirect.com/science/article/pii/S0304397514004241?via%3Dihub).\n",
     "\n",
     "---\n",
@@ -436,7 +435,7 @@
    "file_extension": ".qs",
    "mimetype": "text/x-qsharp",
    "name": "qsharp",
-   "version": "0.10"
+   "version": "0.14"
   }
  },
  "nbformat": 4,

KeyDistribution_BB84/README.md

@@ -18,7 +18,6 @@ There are a variety of different quantum key distribution protocols, however the
 
 * [Introduction to quantum cryptography and BB84](https://www.youtube.com/watch?v=UiJiXNEm-Go).
 * [QKD summer school lecture on quantum key distribution](https://www.youtube.com/watch?v=oEJOtu0joXk).
-* [Key Distribution Wikipedia article](https://en.wikipedia.org/wiki/Quantum_key_distribution)
-* [BB84 Protocol Wikipedia article](https://en.wikipedia.org/wiki/BB84)
-* [Short animated video introducing BB84 protocol](https://www.youtube.com/watch?v=UVzRbU6y7Ks)
+* [Key Distribution Wikipedia article](https://en.wikipedia.org/wiki/Quantum_key_distribution).
+* [BB84 Protocol Wikipedia article](https://en.wikipedia.org/wiki/BB84).
 * [Updated version of the BB84 paper](https://www.sciencedirect.com/science/article/pii/S0304397514004241?via%3Dihub).