Vestiges of "Tasks" features remain in tables `civicrm_task` and `civicrm_task_status`, and in a few classes

Kurund tells me these features were removed in 4.2, but we still have these items lying around:
Table: civcirm_task
Table: civicrm_task_status
Method: CRM_Core_PseudoConstant::tasks()
Method: CRM_Contact_BAO_Query::task()
A few lines in CRM_Contact_BAO_Query::whereClauseSingle()