sos_model: removed unused sequential_simulation method (see _run_sequential_sos_model)
sos_model: removed unused sequential_simulation method (see _run_sequential_sos_model)

tomalrussell/smif,willu47/smif,nismod/smif,willu47/smif,nismod/smif,tomalrussell/smif,willu47/smif,tomalrussell/smif,nismod/smif,tomalrussell/smif,nismod/smif,willu47/smif