removed patternspath as this gives deprecation warnings

When running this init script I get the following warning. I removed the patternspath to fix this.


{:timestamp=>"2013-06-10T17:16:04.492000+0200", :message=>"The --grok-patterns-path flag is deprecated. This flag is going away in the next release. Use the 'patterns_dir' setting in your logstash config instead", :level=>:warn}