Remove the old Mixin library.
Remove the old Mixin library.

hkuplg/fcore,xnning/fcore,wxzh/fcore,zhiyuanshi/fcore,wxzh/fcore,zhiyuanshi/fcore,bixuanzju/fcore,bixuanzju/fcore,hkuplg/fcore,xnning/fcore,wxzh/fcore,hkuplg/fcore,zhiyuanshi/fcore,xnning/fcore,bixuanzju/fcore