simplify

datafusion/optimizer/src/common_subexpr_eliminate.rs

@@ -342,14 +342,9 @@ impl CommonSubexprEliminate {
         let input = unwrap_arc(input);
         let expr = vec![predicate];
         self.try_unary_plan(expr, input, config)?
-            .transform_data(|(mut new_expr, new_input)| {
+            .map_data(|(mut new_expr, new_input)| {
                 assert_eq!(new_expr.len(), 1); // passed in vec![predicate]
                 let new_predicate = new_expr.pop().unwrap();
-                // the closure didn't transform the expr, but will be
-                // combined with the result of try_unary_plan
-                Ok(Transformed::no((new_predicate, new_input)))
-            })?
-            .map_data(|(new_predicate, new_input)| {
                 Filter::try_new(new_predicate, Arc::new(new_input))
                     .map(LogicalPlan::Filter)
             })