revert fluentd changes

Author: mrnicegyu11

services/logging/fluentd/fluent.conf

@@ -35,13 +35,10 @@
 # Add additional metadata
 <filter docker.**>
   @type record_transformer
-  enable_ruby true
   <record>
     hostname "#{Socket.gethostname}"
     fluentd_hostname "#{ENV['FLUENTD_HOSTNAME']}"
     tag ${tag}
-    container_name ${record["container_name"].gsub(/^\/+/, "")}
-    log_service ${record["log_service"].gsub(/^\/+/, "")}
   </record>
 </filter>