tools-setup: remove links to last year's documentation

tools-setup.md

@@ -135,4 +135,4 @@ To be able to push your code, you'll need to add the public part of your key on
 
 ## Step 9: Follow the example assignment
 
-The description of the [example assignment](https://lampepfl-courses.github.io/moocs/example/example.html) contains critical information to properly use the tools you just installed, don't miss it!
+The description of the example assignment (in your personnal gitlab repository) contains critical information to properly use the tools you just installed, don't miss it!