You want to disable Add Row and Remove Button in Production Task Confirmation screen as it its is not required.
SAP Business ByDesign
Reproducing the Issue
1. Go to Production Control workcenter and Task Control view.
2. Select any Task ID 9999 and Confirm.
In Confirmation tab you will notice that there is Add Row and Remove buttons in Output Products and Input Products tab.
Due to Standard behavior it is not possible to remove or disable Add Row and Remove button.
Add Row and Remove is a flexibility provided to make changes in the Input and Output Products during Task Confirmation.
In the real time scenario due to practical reasons there could be changes in Input and Output Products, therefore these options have been provided.
Note: End users can avoid using these buttons as per their Business Requirement.
Production Task, Confirmation, Add Row, Remove, Input Products, Output Products , KBA , SRD-CC-MIG-DMC , Migration: Tool , How To