Remove unnecessary host at haproxy in site.yml

A list of host is not necessary because in
haproxy/main.yml [0] the role is only applied to
haproxy hosts

[0] https://github.com/openstack/kolla/blob/master/ansible/roles/haproxy/tasks/main.yml



Change-Id: Id462315dc225d235917093cdf377ec574368a458
Closes-Bug: #1613648
Signed-off-by: Eduardo Gonzalez <dabarren@gmail.com>

ansible/site.yml

@@ -14,21 +14,7 @@
         tags: elasticsearch,
         when: enable_elasticsearch | bool }
 
-- hosts:
-    - cinder-api
-    - glance-api
-    - haproxy
-    - keystone
-    - mariadb
-    - iscsid
-    - tgtd
-    - multipathd
-    - murano-api
-    - neutron-server
-    - nova-api
-    - rabbitmq
-    - swift-proxy-server
-    - heat-api
+- hosts: haproxy
   roles:
     - { role: haproxy,
         tags: haproxy,