'Happy path when deleting the requirement status.'

def test_remove_credit_requirement_status(self):

    self.assertTrue(self.service.is_credit_course(self.course.id))
    self.enroll()
    set_credit_requirements(self.course.id, [{'namespace': 'grade', 'name': 'grade', 'display_name': 'Grade', 'criteria': {'min_grade': 0.8}}])
    self.service.set_credit_requirement_status(self.user.id, self.course.id, 'grade', 'grade')
    credit_state = self.service.get_credit_state(self.user.id, self.course.id)
    self.assertEqual(credit_state['credit_requirement_status'][0]['status'], 'satisfied')
    self.service.remove_credit_requirement_status(self.user.id, self.course.id, 'grade', 'grade')
    credit_state = self.service.get_credit_state(self.user.id, self.course.id)
    self.assertEqual(credit_state['credit_requirement_status'][0]['status'], None)
