diff --git a/src/cache/s3.rs b/src/cache/s3.rs
index 067d1c703..0ca228cc9 100644
--- a/src/cache/s3.rs
+++ b/src/cache/s3.rs
@@ -14,8 +14,6 @@ use opendal::layers::LoggingLayer;
 use opendal::services::S3;
 use opendal::Operator;
 
-use std::convert::TryInto;
-
 use crate::errors::*;
 
 pub struct S3Cache;