cancelling ap score

will it affect my acceptance if i take the ap tests i signed up for but then cancel the score? the university i was accepted to wants me to send scores but i know im going to do pretty bad so i was thinking of cancelling my score before i send the report. will a cancellation of an ap score look bad since i said i was going to take the exam on commonapp but then i dont give them a score? my school grades are all a's.