Update neutralizeOutput.html (#188)

Author: paul-ion

trainingportal/static/codeBlocks/neutralizeOutput.html

@@ -1,6 +1,4 @@
 <p>This software defense prevents the many flavours of <strong>Cross-Site Scripting</strong></p>
-<p>First if you want to get an idea of the challenges associated with fixing XSS, watch the following public video: 
-<a target="_blank" rel="noopener noreferrer" href="https://youtu.be/FGr6gGqM4f0">How Fixing Cross-Site Scripting is Like Playing Whack-A-Mole</a> </p>
 
 <p>There are several proven ways to ensure the user input doesn't "pop". </p>
 <h5>Output Encoding</h5>
@@ -69,4 +67,4 @@ <h5>Mitigations</h5>
     </li>
 </ul>
 </p>
-<br>
+<br>