Subprogram Contracted_Hamiltonian_module::evaluate_class_8 (this, matrix_elements): Now replaced with the fast class_2_and_8 combined subroutine.
Subprogram Hamiltonian_module::fast_slat (rep1, rep2, fin1, fin2, num_rep1, num_rep2, spin_orbs, tot_num_spin_orbs): No longer used.