1 files changed, 1 insertions, 13 deletions
diff --git a/forest/src/default.rs b/forest/src/default.rs
index 456413b..5e438d4 100644
--- a/forest/src/default.rs
+++ b/forest/src/default.rs
@@ -61,14 +61,6 @@ impl<NodeLabel: GraphLabel, EdgeLabel: GraphLabel> Graph for DefaultForest<NodeL
     }
 }
 
-impl<NodeLabel: GraphLabel, EdgeLabel: GraphLabel> ExtGraph
-    for DefaultForest<NodeLabel, EdgeLabel>
-{
-    fn extend(&mut self, edges: impl IntoIterator<Item = usize>) -> Result<usize, GraphError> {
-        self.graph.extend(edges)
-    }
-}
-
 #[derive(Debug)]
 pub struct LabelIter<'a> {
     set_iter: Iter<'a, usize>,
@@ -88,11 +80,7 @@ impl<'a> Iterator for LabelIter<'a> {
 
 impl<'a> ExactSizeIterator for LabelIter<'a> {
     fn len(&self) -> usize {
-        let (lower, upper) = self.size_hint();
-        // Note: This assertion is overly defensive, but it checks the
-        // invariant guaranteed by the trait.
-        debug_assert!(upper == Some(lower));
-        lower
+        self.set_iter.len()
     }
 }