feat(data/set): remove has_neg instance (#367)

See leanprover-community/mathlib#3212
leanprover-community · Jun 29, 2020 · bdddb70 · bdddb70
1 parent e865d10
commit bdddb70
Showing 1 changed file with 0 additions and 3 deletions.
diff --git a/library/init/data/set.lean b/library/init/data/set.lean
@@ -66,9 +66,6 @@ instance : has_inter (set α) :=
 def compl (s : set α) : set α :=
 {a | a ∉ s}
 
-instance : has_neg (set α) :=
-⟨compl⟩
-
 protected def diff (s t : set α) : set α :=
 {a ∈ s | a ∉ t}