Currently, selected_tests_gen runs in waterfall every 7 days, resulting in occasional BFs. Since the selected_tests_gen task is only really useful for making patch builds more efficient, there is no reason to run it in waterfall.

As a server engineer,
I should not have selected_tests_gen run in waterfall,
because it takes unnecessary resources and does not provide value.

AC:

• When selected_tests_gen is run every 7 days in waterfall, it noops rather than runs the selected_tests.py script