Delete default shift on rest days in bulk on team schedule/planned schedule page

Business uses third party system and HDL or sometimes HSDL loader to load the shift data in bulk for all the employees.

Where as for rest days they are not passing any shift data and hence we see a default shift in Oracle which makes complete week as a working week.

In order to overcome this, line mangers/admins are deleting the shifts manually for each weeks.

Is their any way to overcome manual intervention in deleting the shifts.

If there are any please let me know which helps us a lot.