elasticsearch/logstash — pull request #2228 by jsvd (2014-12-12 15:52:16+00:00)
Title: removes the patterns from patterns dir

The core patterns are now provided by the logstash-patterns-core gem.
This empty folder can be used for custom patterns after https://github.com/logstash-plugins/logstash-filter-grok/pull/5 is merged in the logstash-filter-grok plugin