Removes docimpactgroup: openstack-manuals for select Oslo repos
Removes docimpactgroup: openstack-manuals for select Oslo repos

- Only config items contain doc impact for openstack-manuals.
- Otherwise Oslo is for contributor devs and we do not
track those in the openstack-manuals Launchpad project.

Change-Id: I42f8b00c8593018b61835fcdab5986336552ce67

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