remove zookeeper declaration

since spotify/kafka docker image already exposes zookeeper

Closes #262

CHANGELOG.md

@@ -15,6 +15,7 @@
 of metrics collected and from how many plugins.
 - [#240](https://github.com/influxdb/telegraf/pull/240): procstat plugin, thanks @ranjib!
 - [#244](https://github.com/influxdb/telegraf/pull/244): netstat plugin, thanks @shirou!
+- [#262](https://github.com/influxdb/telegraf/pull/262): zookeeper plugin, thanks @jrxFive!
 
 ### Bugfixes
 - [#228](https://github.com/influxdb/telegraf/pull/228): New version of package will replace old one. Thanks @ekini!

scripts/docker-compose.yml

@@ -42,8 +42,3 @@ redis:
     image: redis
     ports:
         - "6379:6379"
-
-zookeeper:
-    image: spotify/kafka
-    ports:
-        - "2181:2181"