removed references to new command line tutorials from index.html

Author: matyikriszta

index.html

@@ -39,8 +39,6 @@ <h2>HTML</h2>
           <h2>Command Line</h2>
           <ul>
             <li><a href="command-line/introduction/tutorial.html">Lesson 1 - Introduction to the command line</a></li>
-            <li><a href="command-line/command-line/tutorial.html">Lesson 2 - More command line</a></li>
-            <li><a href="command-line/advanced-command-line/tutorial.html">Lesson 3 - Advanced command line</a></li>
           </ul>
 
           <h2>Version Control</h2>