[cs] chore: route handler 쿠키 도메인 설정 구문 수정

apps/cs/app/api/proxy/[...url]/route.ts

@@ -70,7 +70,7 @@ async function handler(
         response.cookies.set(REFRESH_TOKEN, refreshToken, {
           httpOnly: true,
           sameSite: "strict",
-          domain: getCookieDomain(),
+          domain: COOKIE_DOMAIN,
           path: "/",
         });
       }
@@ -105,14 +105,3 @@ export async function PUT(
   const params = await props.params;
   return handler(request, params, "PUT");
 }
-
-function getCookieDomain(): string | undefined {
-  if (typeof window === "undefined") return undefined;
-
-  if (COOKIE_DOMAIN) return COOKIE_DOMAIN;
-
-  const { hostname } = window.location;
-  if (hostname === "localhost" || hostname === "127.0.0.1") return undefined;
-
-  return hostname;
-}