(22247) Remove docs task and references

The building of docs has been moved out of this project and into
docs.puppetlabs.com
Merge branch 'remove_docs_task' into 1.1.x

* remove_docs_task:
  (22247) Remove docs task and references
Merge branch '1.1.x' into 1.2.x

* 1.1.x:
  (22247) Remove docs task and references