fix: CI build failed on main (#13640)

* fix: CI build failed on main

* Update import

Author: jonahgao

datafusion/physical-expr/src/equivalence/class.rs

@@ -20,12 +20,11 @@ use crate::{
     expressions::Column, physical_exprs_contains, LexOrdering, LexRequirement,
     PhysicalExpr, PhysicalExprRef, PhysicalSortExpr, PhysicalSortRequirement,
 };
-use indexmap::IndexSet;
 use std::fmt::Display;
 use std::sync::Arc;
 
 use datafusion_common::tree_node::{Transformed, TransformedResult, TreeNode};
-use datafusion_common::JoinType;
+use datafusion_common::{IndexSet, JoinType};
 use datafusion_physical_expr_common::physical_expr::format_physical_expr_list;
 
 /// A structure representing a expression known to be constant in a physical execution plan.