Last updated: 2021-06-26

Source: https://support.freshdesk.com/support/solutions/articles/227388-how-to-disable-forums-

You can disable Forums from being available to both your agents and customers by turning the 'Forums' toggle OFF from under Admin > Account > Helpdesk Settings.

After this is done, please make sure to hit the 'Save' button on the same page to save the settings.