Remove project_id from edit-slice-memberhip selections.
Remove project_id from edit-slice-memberhip selections.

'project_id' was being mistaking for a member_id. Remove it from the
selections leaving only actual member ids as keys in the selections
array. How did this ever work?

charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,charliemeyer/geni-portal,tcmitchell/geni-portal,tcmitchell/geni-portal