from_home: afs: remove unnecessary bit about ssh-agent

Signed-off-by: Nicolas Froger <nico@cri.epita.fr>

docs/from_home/afs.md

@@ -16,9 +16,6 @@ Host ssh.cri.epita.fr
 Run `kinit -f login@CRI.EPITA.FR` (replace `login` with your login) and type in
 your CRI password when asked.
 
-If you are using a SSH agent, make sure to disable it temporarily in your
-current shell. This can be done by running `unset SSH_AUTH_SOCK`.
-
 ## Browse interactively your AFS
 
 Run `sftp login@ssh.cri.epita.fr`, a SFTP prompt should show up. You can refer