fix bugs

migrations/postgres/02121_user_withdrawal.sql

@@ -1,4 +1,3 @@
--- migrate:up
 CREATE TABLE IF NOT EXISTS "withdrawals" (
     "id" BIGINT GENERATED BY DEFAULT AS IDENTITY NOT NULL,
     "user_id" BIGINT NOT NULL,
@@ -15,9 +14,3 @@ INSERT INTO "system" ("category", "key", "value", "type", "desc", "created_at",
 VALUES
     ('invite', 'WithdrawalMethod', '', 'string', 'withdrawal method', '2025-04-22 14:25:16.637', '2025-04-22 14:25:16.637') ON CONFLICT DO NOTHING;
 
--- migrate:down
-DROP TABLE IF EXISTS "withdrawals";
-DELETE FROM "system"
-WHERE "category" = 'invite'
-  AND "key" = 'WithdrawalMethod';
-