Update setup.mdx

units/en/unit0/setup.mdx

@@ -15,15 +15,11 @@ You can now sign up for our Discord Server. This is the place where you **can ch
 
 👉🏻 Join our discord server <a href="https://discord.gg/ydHrjt3WP5">here.</a>
 
-When you join, remember to introduce yourself in #introduce-yourself and sign-up for reinforcement channels in #channels-and-roles.
+When you join, feel free to introduce yourself in #introduce-yourself!
 
-We have multiple RL-related channels:
-- `rl-announcements`: where we give the latest information about the course.
-- `rl-discussions`: where you can chat about RL and share information.
-- `rl-study-group`: where you can create and join study groups.
-- `rl-i-made-this`: where you can share your projects and models.
-
-If this is your first time using Discord, we wrote a Discord 101 to get the best practices. Check the next section.
+We have multiple channels that may be interesting for your RL-related projects:
+- `#i-made-this`: where you can share your projects and models.
+- `#courses`: where you can chat about RL and other courses, and share information.
 
 Congratulations! **You've just finished the on-boarding**. You're now ready to start to learn Deep Reinforcement Learning. Have fun!