Summer College Program Credit?

Hello, I’m an incoming freshman at Cornell.
I have taken Summer College program for high school students at Cornell in 2015, and I received B in the 3 week course I took. Does anyone know whether students can forfeit the college credit and make the grade not show up for the college transcript?
(I have read the policy on the website that I cannot delete bad grades in the transcript, but I was not sure if this was case if I were to forfeit the credit…)

Thanks!