DELETE an A/B Test for an Email Campaign Activity

Deletes an A/B Test on an primary email campaign activity. You can only delete A/B tests that have a current_status of Draft. Deleting an A/B tests reverts the email campaign activity type from A/B Test (code= 57) back to NewsLetter (code= 10). Constant Contact uses the original subject line, rather than the alternate A/B test subject line, when an A/B test is deleted.