chore: remove duplicate logDao require in subscription route

server/src/routes/subscription.js

@@ -54,7 +54,6 @@ router.post('/subscription/mock-purchase', requireUser, wrap(async (req, res) =>
   const p = PLANS[plan]
   const orderId = 'MOCK' + Date.now()
   await subscriptionDao.purchase(req.user.user_id, plan, p.amount, orderId, p.days)
-  const logDao = require('../dao/log.dao')
   await logDao.write({ user_id: req.user.user_id, action: 'subscription_mock_purchase', detail: '模拟购买: ' + plan, ip: req.ip })
   res.json(ok({ status: 'active', plan, remaining_days: p.days }))
 }))