In the Settings option of Nelio Content, you can delete a social profile from Nelio Content. Doing so, nobody can schedule new social messages nor any scheduled message will be published on that profile. However, Nelio Content will still have access to that network, since you can have other websites that do have configured that profile and thus need to post messages on it.
To completely delete Nelio Content permissions on Facebook, go to your Facebook account (inside Facebook’s site) and select App Settings. Facebook will show you the list of apps that have access to your account.
Select Delete Nelio Content (click the X icon) and the Nelio Content’s permissions will be revoked. Of course, you can always return to give Nelio Content Facebook access Facebook.