PROCESSORS is already documented in base image

Author: jjungnickel

README.md

@@ -21,5 +21,3 @@ Besides the [inherited ones](https://github.com/pires/docker-elasticsearch#envir
 
 * [DISCOVERY_SERVICE](https://www.elastic.co/guide/en/elasticsearch/reference/current/modules-discovery-zen.html#unicast) - the service to be queried for through DNS (default = `elasticsearch-discovery`).
 * [MEMORY_LOCK](https://www.elastic.co/guide/en/elasticsearch/reference/current/important-settings.html#bootstrap.memory_lock) - memory locking control defaults to `false` as Kubernetes requires swap to be disabled.
-* [PROCESSORS](https://github.com/elastic/elasticsearch-definitive-guide/pull/679/files) - allow elasticsearch to optimize for the actual number of available cpus (must be an integer and can be derived from resources.limits - default = 1)
-