removed temporary function _rho_vec_expect. now using cy_expect_rho_vec instead
removed temporary function _rho_vec_expect. now using cy_expect_rho_vec instead

zasdfgbnm/qutip,cgranade/qutip,anubhavvardhan/qutip,qutip/qutip,anubhavvardhan/qutip,cgranade/qutip,zasdfgbnm/qutip,qutip/qutip