Remove get_nphase and state2phase_index - some old crud remaining from legacy fluidity.
Remove get_nphase and state2phase_index - some old crud remaining from legacy fluidity.

jjo31/ATHAM-Fluidity,jrper/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,jrper/fluidity,rjferrier/fluidity,jjo31/ATHAM-Fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,iakovos-panourgias/fluidity,jjo31/ATHAM-Fluidity,rjferrier/fluidity,jrper/fluidity,jrper/fluidity,rjferrier/fluidity,jrper/fluidity,iakovos-panourgias/fluidity