1 files changed, 1 insertions, 7 deletions
diff --git a/compiler/rustc_mir_dataflow/src/framework/lattice.rs b/compiler/rustc_mir_dataflow/src/framework/lattice.rs
index 852099e2ac8..e063eaf74bd 100644
--- a/compiler/rustc_mir_dataflow/src/framework/lattice.rs
+++ b/compiler/rustc_mir_dataflow/src/framework/lattice.rs
@@ -40,7 +40,7 @@
 
 use std::iter;
 
-use rustc_index::bit_set::{BitSet, ChunkedBitSet, MixedBitSet};
+use rustc_index::bit_set::{BitSet, MixedBitSet};
 use rustc_index::{Idx, IndexVec};
 
 use crate::framework::BitSetExt;
@@ -126,12 +126,6 @@ impl<T: Idx> JoinSemiLattice for BitSet<T> {
     }
 }
 
-impl<T: Idx> JoinSemiLattice for ChunkedBitSet<T> {
-    fn join(&mut self, other: &Self) -> bool {
-        self.union(other)
-    }
-}
-
 impl<T: Idx> JoinSemiLattice for MixedBitSet<T> {
     fn join(&mut self, other: &Self) -> bool {
         self.union(other)