Answer:
Say "Thank you for this opportunity and interview, I would like to inform you that after hearing more about this position, I am no longer interested in the job. I appreciate your time and value this interview very much so, though I feel as if my skills won't particularly do me any good in these job position and that I won't be the right person you guys are looking for. Thank you for your time."
Step-by-step explanation:
It is a polite way to decline the job and they will be grateful that you weren't right for the job because there was a chance that they might've wanted to hire you.