Hi Xe Roy,
if you look at this picture here
https://d3nevzfk7ii3be.cloudfront.net/igi/lwxrmbZUrOb2GVua.huge
you see the scrollwheel in the middle. From it an axis on the lower side goes into a part, inside of which the sensor contacts for the movement of the scrollwheel are located on the underside of that black plasticwheel. On the upper side this wheel has marginal notches, where, as the scrollwheel turns, a protrusion in the metal washer at the upper side of the black plastic wheel snaps in, which gives the clicking. Maybe you could remove that metal washer, or flatten its nose. But this might be a difficult transaction.
Good luck,
Fred