Remove email of person that is not longer working on this plugin

Author: matrixik

logstash-output-monasca_log_api.gemspec

@@ -5,7 +5,7 @@ Gem::Specification.new do |s|
   s.summary = 'This gem is a logstash output plugin to connect via http to monasca-log-api.'
   s.description = 'This gem is a logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/plugin install gemname. This gem is not a stand-alone program'
   s.authors = ['Fujitsu Enabling Software Technology GmbH']
-  s.email = '[email protected],[email protected],[email protected]'
+  s.email = '[email protected],[email protected]'
   s.require_paths = ['lib']
   s.homepage = 'https://github.com/logstash-plugins/logstash-output-monasca_log_api'