Was the previous floor removed completely befoe the new one was
installed? If not, it shoudl have been. Also, if you actually
bothered to read the manufacturers installation instructions for the
refrigerator you would have noticed that that it gives minimum
clearances on all sides of the refrigerator, which you have alos most
likely violated. If you trim the cabinet piece, what's going to happen
when you have to replace the refrigerator? It's not going to look nice
unles you can get another refrigerator the same size. Either redo the
floor right if that's what caused the problem, buy a smaller
refrigerator, or remove the cabinet, then wait until your refirgerator
breaks, then but a smaller one and replace the cabinet.