Remove ceilometer api check for Pike+

ceilometer API is not presented starts from Pike

Change-Id: I676186d80a63745f13c12a3e8c3383e60b64ccdc
Related-PROD: PROD-25964 (PROD:25964)
diff --git a/ceilometer/meta/telegraf.yml b/ceilometer/meta/telegraf.yml
index 074db4f..f4d5820 100644
--- a/ceilometer/meta/telegraf.yml
+++ b/ceilometer/meta/telegraf.yml
@@ -1,5 +1,5 @@
 {%- from "ceilometer/map.jinja" import server with context %}
-{%- if server.get('enabled', False) %}
+{%- if server.get('enabled', False) and server.version in ['juno', 'kilo', 'liberty', 'mitaka', 'newton', 'ocata'] %}
 agent:
   input:
     http_response: