Website: Remove broken third-party tutorials from homepage

index.html

@@ -203,10 +203,8 @@ <h1>Third-party tutorials</h1>
 		<li><a href="http://wp.tutsplus.com/tutorials/plugins/adding-a-syntax-highlighter-shortcode-using-prism-js/">Adding a Syntax Highlighter Shortcode Using Prism.js | WPTuts+</a></li>
 		<li><a href="http://www.stramaxon.com/2012/07/prism-syntax-highlighter-for-blogger.html">Implement PrismJs Syntax Highlighting to your Blogger/BlogSpot</a></li>
 		<li><a href="http://www.allblogtools.com/tricks-and-hacks/beautify-source-codes-in-your-posts-with-prism-syntax-highlighter-for-blogger/">Beautify Source Codes In Your Posts With Prism Syntax Highlighter For Blogger</a></li>
-		<li><a href="http://dotnordic.se/extending-and-customizing-prism-syntax-highlighter/">Extending and customizing Prism syntax highlighter</a></li>
 		<li><a href="http://schier.co/blog/2013/01/07/how-to-re-run-prismjs-on-ajax-content.html">How To Re-Run Prism.js On AJAX Content</a></li>
 		<li><a href="http://www.semisedlak.com/article/highlight-your-code-syntax-with-prismjs/">Highlight your code syntax with Prism.js</a></li>
-		<li><a href="http://gmurphey.com/2012/08/09/jekyll-plugin-syntax-highlighting-with-prism.html">Jekyll Plugin: Syntax Highlighting With Prism</a></li>
 		<li><a href="http://byverdu.es/2013/06/tutorial-sobre-prism-js-inserta-ejemplos-de-codigo-en-web-wordpress-y-blogger/">[Spanish] Tutorial sobre Prism.js Como utilizarlo en Web, Wordpress y Blogger</a></li>
 		<li><a href="https://usetypo3.com/fs-code-snippet.html">A code snippet content element powered by Prism.js for TYPO3 CMS</a></li>
 	</ul>