diff --git a/xla/service/copy_insertion.cc b/xla/service/copy_insertion.cc
index 6e2fc858d0958..39eafb7886717 100644
--- a/xla/service/copy_insertion.cc
+++ b/xla/service/copy_insertion.cc
@@ -2293,8 +2293,6 @@ absl::Status CopyInsertion::RemoveUnnecessaryCopies(
     }
   }
 
-  std::unique_ptr<CallGraph> call_graph = CallGraph::Build(module);
-
   int64_t num_existing_copies = GetNumExistingCopies(module, execution_threads);
   bool changed = true;
   int64_t num_iterations = -1;