Remove zuul-cloner workaround for DIB
Remove zuul-cloner workaround for DIB

We added this to work around a bug in zuul-cloner, but the bug is now
fixed.

Change-Id: Ia1332308905f63db24e3af6ca982788270dc7a0e

openstack-infra/project-config,noorul/os-project-config,coolsvap/project-config,anbangr/osci-project-config,noorul/os-project-config,citrix-openstack/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,anbangr/osci-project-config,openstack-infra/project-config,dongwenjuan/project-config,citrix-openstack/project-config,Tesora/tesora-project-config,coolsvap/project-config