For cutting a function, you have to insert a cut on it. A cut it's a return. You can insert a (very bad) forcing cut as :
if (1==1) return 0;
everywhere. So function is ended at this moment and next line lines became death code. It exists quality code program for checking death code, because it's generally a bug of development, normally we put code in comment.
It is the way I used in order to induce JavaCPC, comparing it with my project.