Cook County commissioners on Wednesday passed an ordinance that bans the pretrial detention of juvenile defendants under the age of 13 at Cook County Jail or the Juvenile Temporary Detention Center.The ordinance, which cleared the county board’s Criminal Justice Committee one day earlier, also stresses the removal of a minor from his or her home as “the last resort” and must be “the least restrictive alternative available.”The bill’s sponsor said it won’t affect many current …