clippy

Author: yuhao-su

src/frontend/src/optimizer/plan_node/stream_hash_join.rs

@@ -12,8 +12,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+use std::fmt;
 use std::ops::BitAnd;
-use std::{fmt, vec};
 
 use itertools::Itertools;
 use risingwave_common::catalog::Schema;