We have recently refreshed our branding across our offerings and changed the names of our pricing plans. If you have signed up before Aug 9, 2021, please click Previous plans to view your applicable plans.
We assure you that this change will not impact your product experience, and no action is required on your part.

Navigate to Admin > Support Operations > Apps > Click on Get more apps and search for the app 'Hide/Disable ticket fields'. Once it is installed you choose the fields to be hidden for the agents.

For more information on the app, refer to this solution article.