refactor(backfill): remove unnecessary timestamp fields from user_param insert query

backend/scripts/backfill-falukant-visual-settings.js

@@ -45,13 +45,11 @@ async function insertMissingDefaults({ description, optionValue }) {
 
   const [rows] = await sequelize.query(
     `
-      INSERT INTO community.user_param (user_id, param_type_id, value, created_at, updated_at)
+      INSERT INTO community.user_param (user_id, param_type_id, value)
       SELECT
         u.id,
         :paramTypeId,
-        :encryptedOptionId,
-        NOW(),
-        NOW()
+        :encryptedOptionId
       FROM community."user" u
       LEFT JOIN community.user_param existing
         ON existing.user_id = u.id