Removed remove avatar branch again.

hosts/frontend.bbb.tbm.tudelft.nl/updating.md

@@ -59,12 +59,6 @@ git checkout streaming
 git merge upstream-2.9.0
 ```
 
-Update the branch removing avartars:
-```
-git checkout disable_avatar
-git merge upstream-2.9.0
-```
-
 Merge all feature branches into the new custom-branch
 ```
 git checkout custom-v290