优化代码质量

src/utils/access_control.go

@@ -2,7 +2,6 @@ package utils
 
 import (
 	"strings"
-	"sync"
 
 	"hubproxy/config"
 )
@@ -17,7 +16,6 @@ const (
 
 // AccessController 统一访问控制器
 type AccessController struct {
-	mu sync.RWMutex
 }
 
 // DockerImageInfo Docker镜像信息

src/utils/ratelimiter.go

@@ -176,8 +176,9 @@ func (i *IPRateLimiter) GetLimiter(ip string) (*rate.Limiter, bool) {
 
 	now := time.Now()
 
+	var entry *rateLimiterEntry
 	i.mu.RLock()
-	entry, exists := i.ips[normalizedIP]
+	_, exists := i.ips[normalizedIP]
 	i.mu.RUnlock()
 
 	if exists {