Revert "Make pipelines properly propagate their targets to child pipelines"
Revert "Make pipelines properly propagate their targets to child pipelines"

This reverts commit 443e3112b7f532ae70537c625c48e8b04cb326b1.

aozarov/appengine-pipelines,aozarov/appengine-pipelines,VirusTotal/appengine-pipelines,googlecloudplatform/appengine-pipelines,googlecloudplatform/appengine-pipelines,GoogleCloudPlatform/appengine-pipelines,GoogleCloudPlatform/appengine-pipelines,vendasta/appengine-pipelines,VirusTotal/appengine-pipelines,GoogleCloudPlatform/appengine-pipelines,vendasta/appengine-pipelines,aozarov/appengine-pipelines,aozarov/appengine-pipelines,aozarov/appengine-pipelines,GoogleCloudPlatform/appengine-pipelines,VirusTotal/appengine-pipelines,Loudr/appengine-pipelines,googlecloudplatform/appengine-pipelines,vendasta/appengine-pipelines,Loudr/appengine-pipelines,Loudr/appengine-pipelines,vendasta/appengine-pipelines,Loudr/appengine-pipelines,Loudr/appengine-pipelines,googlecloudplatform/appengine-pipelines,googlecloudplatform/appengine-pipelines,VirusTotal/appengine-pipelines,GoogleCloudPlatform/appengine-pipelines,vendasta/appengine-pipelines,VirusTotal/appengine-pipelines