remove cp file

oss/download.go

@@ -326,7 +326,8 @@ func (cp *downloadCheckpoint) prepare(bucket *Bucket, objectKey, filePath string
 }
 
 func (cp *downloadCheckpoint) complete(cpFilePath string) error {
-	return os.Remove(cpFilePath)
+	os.Remove(cpFilePath)
+    return nil
 }
 
 // 并发带断点的下载

oss/upload.go

@@ -365,7 +365,7 @@ func complete(cp *uploadCheckpoint, bucket *Bucket, parts []UploadPart, cpFilePa
 	if err != nil {
 		return err
 	}
-	err = os.Remove(cpFilePath)
+	os.Remove(cpFilePath)
 	return err
 }