Remove doc repositories from projects.txt

The documentation repositories maintained by the OpenStack
Documentation team are currently all in projects.txt. They
are not installed together OpenStack server projects.

While the syncing of requirements is nice, it's not essential that
Documentation repo are part of requirements. The Documentation
repos have additional unique dependencies that are not needed by
other projects.

Still, the Documentation team likes to ensure that their requirements
are not conflicting with global requirements to allow editors and
developers reuse environments.

As discussed with Documentation team, remove these repositories
now (see thread starting at
http://lists.openstack.org/pipermail/openstack-docs/2015-April/006362.html).

Change-Id: I807b061cf697dc79b26ffdfbe023c32600ddd346

projects.txt

@@ -1,5 +1,4 @@
 openstack-dev/hacking
-openstack/api-site
 openstack/barbican
 openstack/ceilometer
 openstack/ceilometermiddleware
@@ -10,7 +9,6 @@ openstack/designate
 openstack/diskimage-builder
 openstack/django_openstack_auth
 openstack/glance
-openstack/ha-guide
 openstack/heat
 openstack/horizon
 openstack/ironic
@@ -25,8 +23,6 @@ openstack/neutron-lbaas
 openstack/neutron-vpnaas
 openstack/nova
 openstack/openstack-doc-tools
-openstack/openstack-manuals
-openstack/operations-guide
 openstack/os-apply-config
 openstack/os-cloud-config
 openstack/os-collect-config
@@ -72,14 +68,12 @@ openstack/sahara
 openstack/sahara-dashboard
 openstack/sahara-extra
 openstack/sahara-image-elements
-openstack/security-doc
 openstack/stevedore
 openstack/swift
 openstack/taskflow
 openstack/tempest
 openstack/tempest-lib
 openstack/tooz
-openstack/training-guides
 openstack/trove
 openstack/tuskar
 openstack/tuskar-ui