no need lock here

@@ -47,26 +47,20 @@ import (
 	"net/url"
 	"os"
 	"strings"
-	"sync"
 	"time"
 )
 
 var defaultSetting = BeegoHttpSettings{UserAgent: "beegoServer", ConnectTimeout: 60 * time.Second, ReadWriteTimeout: 60 * time.Second, Gzip: true}
 var defaultCookieJar http.CookieJar
-var settingMutex sync.Mutex
 
 // createDefaultCookie creates a global cookiejar to store cookies.
 func createDefaultCookie() {
-	settingMutex.Lock()
 	defaultCookieJar, _ = cookiejar.New(nil)
-	settingMutex.Unlock()
 }
 
 // Overwrite default settings
 func SetDefaultSetting(setting BeegoHttpSettings) {
-	settingMutex.Lock()
 	defaultSetting = setting
-	settingMutex.Unlock()
 }
 
 // return *BeegoHttpRequest with specific method