It's probably about this answer (now deleted). You left it in the form
(not the answer, moved back to poster comments)
Screenshot for users who cannot see deleted answers:
You said it's not the answer. More importantly, answer that only says it's not the answer, is literally not an answer to the question. Considering it "not an answer", tagging as "does not answer the question" and commenting "this does not provide an answer to the question" seems to agree with your own statement and the actual state of the "answer" at the time.
Whether or not the reviewers recognized that the "answer" is from the author of the question is irrelevant. It should have been deleted regardless.
It would have been better if you deleted it on your own in the first place, instead of editing it to a not-an-answer state. The timeline shows the review process started after you edited the answer. You didn't delete it, then the reviewers did this for you. Proper action was taken.