Update doc to reflect neutron became devstack default
Update doc to reflect neutron became devstack default

Removing the explicit enablment of Neutron services, as with [1] they are configured as defaults in stackrc.

[1] https://review.openstack.org/#/c/350750/

Change-Id: Ic8910cd28fe37842f7d824e68bd2ea705e7e52de

group-policy/devstack,nawawi/openstack,dtroyer/devstack,group-policy/devstack,noironetworks/devstack,nawawi/openstack,openstack-dev/devstack,openstack-dev/devstack,bswartz/devstack,dtroyer/devstack,richliu/devstack,noironetworks/devstack,bswartz/devstack,richliu/devstack