Before this commit there is a sub-type to notify parent if child stage change but with new to-do state feature we don't to unnecessory notification on parent which is more problemation then informative. This commit remove task dependency sub-type and it's related code. task-3252755 closes odoo/odoo#118418 Related: odoo/enterprise#39972 Related: odoo/upgrade#4542 Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>