Remove $len from first helper since its not needed.

src/renderer/renderer.rs

@@ -703,24 +703,16 @@ impl<'a> DustRenderer<'a> {
                 );
 
                 let index = self.get(breadcrumbs, &vec!["$idx"]);
-                let len = self.get(breadcrumbs, &vec!["$len"]);
-                match (index, len) {
-                    (Err(_), _) | (_, Err(_)) => return Ok("".to_owned()),
-                    (Ok(index_resolved), Ok(len_resolved)) => {
+                match index {
+                    Err(_) => return Ok("".to_owned()),
+                    Ok(index_resolved) => {
                         // Iteration contexts use OwnedLiteral::LPositiveinteger
                         let index_cast = index_resolved
                             .get_context_element_reference()
                             .to_any()
                             .downcast_ref::<OwnedLiteral>();
-                        let len_cast = len_resolved
-                            .get_context_element_reference()
-                            .to_any()
-                            .downcast_ref::<OwnedLiteral>();
-                        match (index_cast, len_cast) {
-                            (
-                                Some(OwnedLiteral::LPositiveInteger(index_number)),
-                                Some(OwnedLiteral::LPositiveInteger(len_number)),
-                            ) => {
+                        match index_cast {
+                            Some(OwnedLiteral::LPositiveInteger(index_number)) => {
                                 if *index_number != 0 {
                                     return Ok("".to_owned());
                                 } else {