Remove UndercloudLight

The role isn't used and doesn't fit with our all-in-one installer.

Change-Id: Ifdda732f53785e1f5ff46155243e7141a82479b0

roles/UndercloudLight.yaml

@@ -1,40 +0,0 @@
-###############################################################################
-# Role: UndercloudLight                                                       #
-###############################################################################
-- name: UndercloudLight
-  description: |
-    EXPERIMENTAL. A role to deploy the  minimal undercloud for pre-provisioned
-    deployed servers via heat using the 'openstack undercloud deploy' command.
-    Should be used with the 'environments/docker-uc-light.yaml' template
-    instead of the 'environments/docker.yaml'.
-  CountDefault: 1
-  disable_constraints: True
-  tags:
-    - primary
-    - controller
-  ServicesDefault:
-    - OS::TripleO::Services::ContainersLogrotateCrond
-    - OS::TripleO::Services::Docker
-    - OS::TripleO::Services::DockerRegistry
-    - OS::TripleO::Services::HeatApi
-    - OS::TripleO::Services::HeatApiCfn
-    - OS::TripleO::Services::HeatEngine
-    - OS::TripleO::Services::Keystone
-    - OS::TripleO::Services::LoginDefs
-    - OS::TripleO::Services::Memcached
-    - OS::TripleO::Services::MistralApi
-    - OS::TripleO::Services::MistralEngine
-    - OS::TripleO::Services::MistralExecutor
-    - OS::TripleO::Services::MySQL
-    - OS::TripleO::Services::NeutronApi
-    - OS::TripleO::Services::NeutronCorePlugin
-    - OS::TripleO::Services::NeutronDhcpAgent
-    - OS::TripleO::Services::OsloMessagingRpc
-    - OS::TripleO::Services::OsloMessagingNotify
-    - OS::TripleO::Services::Rhsm
-    - OS::TripleO::Services::MasqueradeNetworks
-    - OS::TripleO::Services::SwiftProxy
-    - OS::TripleO::Services::SwiftRingBuilder
-    - OS::TripleO::Services::SwiftStorage
-    - OS::TripleO::Services::Zaqar
-    - OS::TripleO::Services::Tempest