Remove unused "transformers" field from event pipeline configuration

Transformer was already removed from ceilometer by [1]. This field
was removed from the example configuration file when transformer was
deprecated[2].

[1] 9db5c6c9bfc66018aeb78c4a262e1bfa9b326798
[2] 1dcbd607df0696101b40f77d7721489679ebe0ba

Change-Id: I012d3f960d2a562c2735e7b5c1e408a3a1addb70

spec/classes/ceilometer_agent_notification_spec.rb

@@ -125,7 +125,6 @@ describe 'ceilometer::agent::notification' do
           "          - event_sink",
           "sinks:",
           "    - name: event_sink",
-          "      transformers:",
           "      publishers:",
           "          - gnocchi://",
       ])}
@@ -148,7 +147,6 @@ describe 'ceilometer::agent::notification' do
           "          - event_sink",
           "sinks:",
           "    - name: event_sink",
-          "      transformers:",
           "      publishers:",
           "          - notifier://",
           "          - notifier://?topic=alarm.all",
@@ -166,7 +164,6 @@ describe 'ceilometer::agent::notification' do
           ],
           'sinks'   => [
             'name'       => 'my_event_sink',
-            'transformers' => [],
             'publishers' => ['gnocchi://'],
           ],
         }
@@ -182,7 +179,6 @@ sources:
   - my_event_sink
 sinks:
 - name: my_event_sink
-  transformers: []
   publishers:
   - gnocchi://
 ',
@@ -220,7 +216,6 @@ sinks:
           ],
           'sinks'   => [
             'name'       => 'my_sink',
-            'transformers' => [],
             'publishers' => ['gnocchi://'],
           ],
         }
@@ -236,7 +231,6 @@ sources:
   - my_sink
 sinks:
 - name: my_sink
-  transformers: []
   publishers:
   - gnocchi://
 ',

templates/event_pipeline.yaml.erb

@@ -7,7 +7,6 @@ sources:
           - event_sink
 sinks:
     - name: event_sink
-      transformers:
       publishers:
 <% @event_pipeline_publishers.each do |publisher| -%>
           - <%= publisher %>