fix client.go duplicate code

internal/upstream/client.go

@@ -270,14 +270,3 @@ req.Header.Set("User-Agent", uarand.GetRandom())
 
 	return resp, targetModel, nil
 }
-
-	return resp, targetModel, nil
-}
-
-if sess, err := auth.GetAnonymousSession(); err == nil {
-    var cookieStrs []string
-    for _, c := range sess.Cookies {
-        cookieStrs = append(cookieStrs, c.Name+"="+c.Value)
-    }
-    req.Header.Set("Cookie", strings.Join(cookieStrs, "; "))
-}