Remove field rawSectionZ

Field rawSectionZ is always empty, because the section delimiter
signals the end of the event. There is no data in this part.
No need to keep an empty field.

Author: Lucas Bremgartner

2500_filter_cleanup.conf

@@ -5,7 +5,7 @@ filter {
     # Get rid of fields that we don't need anymore
     #~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     mutate {
-      remove_field => [ "message", "raw_responseHeaders", "raw_requestHeaders"]
+      remove_field => [ "message", "raw_responseHeaders", "raw_requestHeaders", "rawSectionZ"]
     }
   }
 }