chore: remove unused BoundPredicate::and method and unused import

Author: sdd

crates/iceberg/src/delete_file_index.rs

@@ -2,7 +2,7 @@ use std::collections::HashMap;
 use std::sync::Arc;
 
 use futures::channel::mpsc;
-use futures::{StreamExt, TryFutureExt, TryStreamExt};
+use futures::{StreamExt, TryStreamExt};
 use tokio::sync::watch;
 
 use crate::scan::{DeleteFileContext, FileScanTaskDeleteFile};

crates/iceberg/src/expr/predicate.rs

@@ -724,12 +724,6 @@ pub enum BoundPredicate {
     Set(SetExpression<BoundReference>),
 }
 
-impl BoundPredicate {
-    pub(crate) fn and(self, other: BoundPredicate) -> BoundPredicate {
-        BoundPredicate::And(LogicalExpression::new([Box::new(self), Box::new(other)]))
-    }
-}
-
 impl Display for BoundPredicate {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         match self {