How to disable 'Remove from Document'/Delete option of item in Performance document

Summary

How to disable 'Remove from Document'/Delete option of item in Performance document

Content

Hi All,

We have a requirement in Performance Document. When employee enters into his/her performance document and selects the Section, there is a option to remove the item from the section. As per the ask, the remove button should not be visible for the section items. So that employee cannot remove it. 

May I know how to achieve it. Attaching the screenshot for your reference. 

Navigation: Login as an Employee > Selected his/her Performance document > Under Evaluation Topics > Selected the Section to see the items. There we have a option(X button or Remove from Document) to delete the item.