Disable Manager and Employee to add a chech-in document

Hello everyone,

Our client don't want the Manager and the Employee to have the ability to add check-ins document. They should only be able to edit. (hide the Add Button)
We tried by removing "Manage check-in document" privilege from their roles, but the result is that they can't add check-ins anymore (That's what we expected) and they can't edit either (we don't want this).
Please is there any way to hide the Add check-in Button to Manager and Employee but live them the ability to edt check-ins?

Thank you in advance for your reply

Sacké Mathieu