How to remove default duration when requesting absence?

Summary:

Currently when requesting an absence, after selecting a date the system defaults the duration based on the schedule. We would like to turn this defaulting off and still use schedules. Is there a way to achieve this?

Content (required):

Current behavior:

When requesting/entering absence, the duration defaults based on the worker's schedule.

Desired behavior:

When requesting/entering absence, the duration defaults to 0 (or blank) regardless of the worker's schedule.

Version (include the version you are using, if applicable):

22D

Code Snippet (add any code snippets that support your topic, if applicable):