diff --git a/common/model-ratio.go b/common/model-ratio.go
index 7513a8f3..5e7d5729 100644
--- a/common/model-ratio.go
+++ b/common/model-ratio.go
@@ -4,7 +4,6 @@ import (
 	"encoding/json"
 	"github.com/songquanpeng/one-api/common/logger"
 	"strings"
-	"time"
 )
 
 const (