Problem 44376. The sliding puzzle: 3D

I deserve zero credit for this solution. After observing the leading solution to this problem, I thought I found a small improvement to be had. I tested my change, and although the complexity went up, my solution may have been slightly more efficient. I didn't realize that Cody would give me credit for solving the problem, even though I had only modified someone else's answer.

Is there a way for me to delete this solution (which would also mean renouncing my Cody 5 badge)?