Google cache shows that this question had two answers.
What happened to this answer?
Is it deleted by SE admin?
The user that posted the answer either deleted their account themselves, or had their account deleted or destroyed. When an account is deleted, all contributions with a negative score are also deleted (with some exceptions, see here). When an account is destroyed, all contributions are deleted regardless of score.
This post had a score of -1, so was deleted automatically by the Community user when the poster's account was removed.