Update src/lib/rate-limit.ts

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: Ruthgyeul

src/lib/rate-limit.ts

@@ -15,7 +15,6 @@ export function rateLimit({ interval, uniqueTokenPerInterval = 500 }: RateLimitO
   return {
     check: async (limit: number, token: string): Promise<number> => {
       const now = Date.now();
-      const tokenKey = `${token}_${now}`;
 
       // 이전 토큰들 정리
       for (const [key, value] of tokens.entries()) {