Sure! But I think deleting the comment before the person is actually able to convert the comment to an answer is bad. I believe people will forget what they just said in the comment, and thus we lose a potential (good) answer.
Do we get notification, and ideally our answer-comment, when it is deleted?
If not, I think mod should message the user their comment and ask to convert it to answer.
As an alternative, maybe ping the users that have answer-comments, and wait 24-hour before deleting them. It will be great if there is a delayed-deletion feature for answer-comment!