[doc] Remove the collectd-openstack-plugins alarms section in the heat scaling guide

* Also removed the sample template threshold.yaml

Change-Id: I2c18bf8edd87a2fe7489a3916518a5eb3407148c
closes-bug: #1729903

doc/source/examples/templates/threshold.yml

@@ -1,59 +0,0 @@
-heat_template_version: 2014-10-16
-description: A simple auto-scalable server, based on a threshold alarm.
-
-resources:
-  group:
-    type: OS::Heat::AutoScalingGroup
-    properties:
-      cooldown: 60
-      desired_capacity: 2
-      max_size: 3
-      min_size: 1
-      resource:
-       type: OS::Nova::Server
-       properties:
-         image: cirros-0.3.5-x86_64-disk
-         flavor: m1.nano
-         networks:
-           - network: public
-         key_name: scale
-
-  scaleup_policy:
-    type: OS::Heat::ScalingPolicy
-    properties:
-      adjustment_type: change_in_capacity
-      auto_scaling_group_id: { get_resource: group }
-      cooldown: 60
-      scaling_adjustment: 1
-
-  scaledown_policy:
-    type: OS::Heat::ScalingPolicy
-    properties:
-      adjustment_type: change_in_capacity
-      auto_scaling_group_id: { get_resource: group }
-      cooldown: 60
-      scaling_adjustment: -1
-
-  no_change_policy:
-    type: OS::Heat::ScalingPolicy
-    properties:
-      adjustment_type: change_in_capacity
-      auto_scaling_group_id: { get_resource: group }
-      cooldown: 60
-      scaling_adjustment: 0
-
-  cpu_alarm_high:
-    type: OS::Aodh::Alarm
-    properties:
-      meter: cpu.cpu
-      threshold: 1
-      period: 60
-      evaluation_period: 1
-      alarm_actions:
-        - {get_attr: [scaleup_policy, alarm_url]}
-      ok_actions:
-        - {get_attr: [scaledown_policy, alarm_url]}
-      insufficient_actions:
-        - {get_attr: [no_change_policy, alarm_url]}
-      comparison_operator: gt
-      statistic: max

doc/source/heat_scaling_guide.rst

@@ -38,7 +38,7 @@ policies.
        The collectd-gnocchi plugin only supports certain types of Aodh alarms.
        Please find a list of these options in:
 
-https://github.com/openstack/collectd-ceilometer-plugin/blob/master/doc/source/alarms_guide.rst.
+https://github.com/openstack/collectd-ceilometer-plugin/blob/master/doc/source/alarms_guide.rst
 
 
 Creating a heat template for auto-scaling
@@ -125,23 +125,6 @@ it has scaled up/down via:
     openstack server list
 
 
-collectd-ceilometer-plugin alarms
----------------------------------
-
-As described in alarms_guide.rst, this plugin allows you to create Aodh
-threshold alarms. This type of alarm can be defined in a heat template using
-an OS::Aodh::Alarm resource.
-Define this resource with the ceilometer meter that you want to monitor and
-the threshold you want the alarm to be triggered at.
-For more information on this resource:
-https://docs.openstack.org/heat/latest/template_guide/openstack.html#OS::Aodh::Alarm
-
-  ::
-
-    threshold_alarm:
-      type: OS::Aodh::Alarm
-
-
 collectd-gnocchi-plugin alarms
 ------------------------------