How do you hide time card required 'No' assignments from showing on the time card?

Hi there,

We have a population of employees who may have multiple assignments, however, not all of their assignments are time card reporting assignments. So the time card reporting assignments will have 'Time Card Required = Yes' for both the Assigned Payroll and Payroll Assignment Details. The non-time card reporting assignment will have 'Time Card Required = No' for both the Assigned Payroll and Payroll Assignment Details. Unfortunately, both are still appearing on the time card assignments drop down when we are entering hours on the time card.

How do you hide the "Time Card Required = No" assignments from appearing on the time card?