**Remove Unused Parameter** refactoring

crates/assists/src/utils.rs

@@ -9,7 +9,7 @@ use itertools::Itertools;
 use rustc_hash::FxHashSet;
 use syntax::{
     ast::{self, make, NameOwner},
-    AstNode,
+    AstNode, Direction,
     SyntaxKind::*,
     SyntaxNode, TextSize, T,
 };
@@ -311,3 +311,7 @@ pub use prelude::*;
         Some(def)
     }
 }
+
+pub(crate) fn next_prev() -> impl Iterator<Item = Direction> {
+    [Direction::Next, Direction::Prev].iter().copied()
+}