disable output of caller

output/file/main.go

@@ -56,7 +56,9 @@ func Init(configInterface interface{}, db *database.DB, bot *bot.Bot) output.Out
 	return &Output{
 		defaults: defaults,
 		files:    make(map[string]*os.File),
-		formatter: &log.JSONFormatter{},
+		formatter: &log.JSONFormatter{
+			DisableCaller: true,
+		},
 		path: config.Directory,
 	}
 }

output/xmpp/main.go

@@ -141,6 +141,7 @@ func Init(configInterface interface{}, db *database.DB, bot *bot.Bot) output.Out
 		channels: channels,
 		client:   client,
 		formatter: &log.TextFormatter{
+			DisableCaller:    true,
 			DisableTimestamp: true,
 		},
 	}