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-rw-r--r--theories/Numbers/Integer/BigZ/BigZ.v2
1 files changed, 0 insertions, 2 deletions
diff --git a/theories/Numbers/Integer/BigZ/BigZ.v b/theories/Numbers/Integer/BigZ/BigZ.v
index 5189a33efa..f7c423ebbc 100644
--- a/theories/Numbers/Integer/BigZ/BigZ.v
+++ b/theories/Numbers/Integer/BigZ/BigZ.v
@@ -104,8 +104,6 @@ exact sub_opp.
exact add_opp.
Qed.
-Typeclasses unfold NZadd NZmul NZsub NZeq.
-
Add Ring BigZr : BigZring.
(** Todo: tactic translating from [BigZ] to [Z] + omega *)