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-rw-r--r--lib/UnionFind.v1
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diff --git a/lib/UnionFind.v b/lib/UnionFind.v
index 553d905..84d0348 100644
--- a/lib/UnionFind.v
+++ b/lib/UnionFind.v
@@ -15,7 +15,6 @@
(** A persistent union-find data structure. *)
-Require Import Wf.
Require Recdef.
Require Setoid.
Require Coq.Program.Wf.