Cleanup of unnecessary items in user scripts config. JSON

Fixes #5456

scripts/lua/modules/callback_definitions/host/flows_anomaly.lua

@@ -3,7 +3,6 @@
 --
 
 local user_scripts = require("user_scripts")
-local alert_severities = require "alert_severities"
 local host_alert_keys = require "host_alert_keys"
 
 -- #################################################################
@@ -15,7 +14,6 @@ local flows_anomaly = {
    alert_id = host_alert_keys.host_alert_flows_anomaly,
 
   default_value = {
-    severity = alert_severities.warning,
   },
 
   gui = {